Air Conditioning Service Near Me: Find Trusted Cooling And Heating System Repair Work Near To Your Place

Types of HVAC Repair Solutions You Can Rely On

Ever wondered why your air conditioning unit all of a sudden stops blowing cold air on the hottest day of the year? Or why the heating system seems to sputter more than warm your home when winter bites? These recognize headaches for anyone looking for A/c Repair Near Me. The difficulties don't stop there: odd sounds, varying temperature levels, or ineffective air flow can turn convenience into chaos.

Fortunately, Bold City Heating and Air deals with these problems head-on, offering a spectrum of specialized repair services that change discomfort into relaxing relief. Bold City Heating and Air. Here's a glance at the core services they master:

1. Cooling Repair: From refrigerant leakages to compressor failures, every component is inspected and fixed to restore cool air circulation.
2. Heating System Repair: Whether it's a malfunctioning thermostat or a damaged heater igniter, no cold night goes unaddressed.
3. Ductwork Repair: Leaky ducts can waste energy and minimize indoor air quality. Repairing these hidden perpetrators is a video game changer.
4. Thermostat Calibration: Precision in temperature level control ensures your system runs effectively, conserving energy and money.
5. Emergency A/c Solutions: When your system fails unexpectedly, prompt repair work lessen downtime and pain.

Imagine walking into your home after a blistering day, welcomed by a fresh, perfectly conditioned breeze. Or huddling on a wintry night, positive your heating won't betray you. These aren't simply dreams-- Bold City Heating and Air makes them truth with every repair work.

Why choose less when the very best heating and cooling repair work near me can handle everything from small problems to significant malfunctions? Bold City Heating and Air does not just repair systems-- they restore comfort and convenience to your home.

Typical HVAC Problems and Solutions

When your air conditioning unit sputters and stalls on the most popular day, it feels like deep space is playing a terrible joke. Among the most regular culprits? A clogged up air filter. Dust, animal hair, and particles choke the airflow, forcing your system to work overtime and ultimately fail. Ever wonder why your energy expenses suddenly surge? That's your heating and cooling system gasping under pressure.

Bold City Heating and Air comprehends the subtle indications that typically go unnoticed till it's almost far too late. A whisper of odd noises or a faint burning smell can signal internal concerns that, if attended to swiftly, avoid pricey replacements.

Top A/c Problems Decoded

• Refrigerant leaks-- Invisible yet impactful, these leakages weaken cooling performance and can harm the environment.
• Thermostat malfunctions-- Sometimes the culprit isn't the system but the brain behind it, misreading temperatures and sending blended signals.
• Frozen coils-- Typically a result of bad airflow or low refrigerant, these icy transgressors stop cooling altogether.

Expert Tips to Keep Your System in Peak Forming

1. Modification filters every 1-3 months; it's the most basic act with the greatest reward.
2. Inspect condensate drains for obstructions to prevent water damage and mold buildup.
3. Seal duct leakages to improve effectiveness-- in some cases a few inches of tape save you hundreds.

Have you ever saw your system cycling on and off like a nervous heart beat? That brief cycling is a warning that Bold City Heating and Air immediately acknowledges. Bold City Heating and Air. They dive deep, diagnosing with accuracy, ensuring your a/c does not simply limp along however grows. Their approach changes stress and anxiety into relief, turning technical headaches into cool convenience

Picking a Reliable HVAC Repair Professional

When your air conditioner sputters out in the peak of summer, or your heating unit refuses to warm a cold night, you don't just want any professional-- you desire someone who comprehends the heart beat of your home's heating and cooling system. Not every professional has the propensity for detecting the sly perpetrators behind inefficient cooling or heating. Think of calling someone who covers the issue temporarily, just to have the system fail again days later. Aggravating, right?

Bold City Heating and Air understands that dependability isn't simply about appearing; it's about revealing up ready. Their specialists show up geared up with diagnostic tools that dive much deeper than surface area symptoms, catching the real essence of the breakdown. They do not simply replace parts; they unravel the story your system is informing. Have you ever questioned why your energy expenses increase mysteriously? In some cases, it's a subtle refrigerant leakage or a stopped up filter that's easy to ignore but costly if disregarded.

Professional Tips for Spotting a Competent A/c Technician

• Accreditation and Licensing: Confirm credentials-- trained pros back their work with acknowledged certifications.
• Transparent Quotes: Look for clear descriptions, not unclear quotes that dodge the details.
• Diagnostic Method: Experts utilize methodical checks-- no guesswork, simply precise analytical.
• Interaction Abilities: Can they discuss repair work without jargon? That's a sign they appreciate your understanding.
• Parts Quality Awareness: They need to focus on durable components, not quick fixes that fade quick.

Bold City Heating and Air flourishes on a viewpoint that HVAC repair is less about quick fixes and more about long-lived solutions crafted with care. They welcome the intricacy of each system, turning what might appear like a complicated repair work into a smooth, transparent procedure. Like a knowledgeable detective, they unwind the quirks of your system, guaranteeing that your convenience isn't simply brought back, but optimized.

Translating the Costs Behind Heating And Cooling Repair Work Services

Ever discovered how a basic a/c repair can in some cases spiral into a wallet-busting ordeal? The fact depends on the labyrinth of surprise factors that influence repair expenses. From the extent of the damage to the age of your system, these elements weave an intricate story.

Think of a cold night where your a/c unit sputters and fails. You require HVAC repair work near me, and unexpectedly, you're confronted with a quote that feels like a puzzling puzzle (Bold City Heating and Air). What precisely drives these numbers?

Secret Elements Affecting Repair Expenses

• Intensity of the Concern: Minor problems like thermostat malfunctions cost less compared to compressor or coil replacements.
• Equipment Age: Older systems frequently need more extensive repair work or part replacements, which hikes the price.
• Labor Intricacy: Difficult-to-access units demand more time and expertise, naturally increasing labor expenses.
• Replacement Parts: Real parts versus generic ones, availability, and shipping can swing expenses extensively.
• Emergency situation Service: Repair work done outside routine hours normally come with premium fees.

Bold City Heating and Air understands these complexities like the back of their hand. They have actually seen direct how a cracked blower wheel or a clogged condensate drain can turn into a costly experience if overlooked. Their technicians don't simply patch up-- they identify with precision, guaranteeing you pay for what's necessary, not a penny more.

Here's a professional suggestion: regular examination of your heating and cooling system's filters and condensate lines can prevent little concerns from growing out of control. Did you understand a clogged up filter can force your system to work overtime, triggering wear that demands pricey repairs?

Does your HVAC repair price quote feel like a shot in the dark? Bold City Heating and Air's openness and proficiency illuminate the procedure, guiding you through what each cost suggests. Comprehending these factors can turn a stressful repair into a workable financial investment in your home's comfort.

Reliable A/c Service in Jacksonville, FL

Jacksonville, FL is a lively city understood for its comprehensive park system, beautiful beaches, and dynamic riverfront. As the most populous city in Florida, it uses a diverse economy with strong sectors in finance, logistics, and health care. The city's warm climate makes efficient and reputable a/c systems necessary for citizens and companies alike to stay comfortable year-round.

For those seeking professional advice and expert HVAC repair near me, Bold City Heating and Air can offer a free assessment to help deal with any cooling or heating concerns effectively. They are all set to assist with all your heating and cooling requires.

1. 32206: 32206 is a zip code encompassing a varied area of Jacksonville FL. It comprises Arlington, known for its mid-century architecture and easy access to downtown.
2. 32207: 32207 is a zip code encompassing parts of Jacksonville's Southside, known for its mix of residential areas and commercial developments. It includes diverse neighborhoods and easy access to major roadways. Jacksonville FL
3. 32208: 32208 is a zip code covering parts of Jacksonville FL's Southside, recognized for its combination of housing areas and business hubs. It includes well-known places like the Avenues Mall and nearby business parks.
4. 32209: 32209 is a zip code including sections of Arlington, a large and diverse housing district in Jacksonville FL. It provides a combination of accommodation options, parks, and convenient access to downtown.
5. 32210: This zip code is a dynamic neighborhood in Jacksonville FL, known for its blend of residential areas and commercial businesses. It gives a convenient location with simple access to major roadways and nearby conveniences.
6. 32211: 32211 is a zip code primarily covering the Arlington area of Jacksonville FL. It is a vast residential district with a mix of housing choices, retail businesses, and parks.
7. 32099: 32099 encompasses Ponte Vedra Beach, a coastal community known for its upscale homes and golf courses. It offers beautiful beaches and a laid-back, resort style atmosphere.
8. 32201: 32201 is a downtown Jacksonville FL zip code including the city center. It includes sites like the Jacksonville Landing and historical buildings.
9. 32202: The 32202 ZIP code is a lively neighborhood in Jacksonville FL, Florida known for its historical allure and varied community. It provides a combination of residential areas, small businesses, and cultural sites.
10. 32203: 32203 is a zip code covering a big part of Jacksonville FL's city center area and nearby communities. It contains many historic structures, businesses, and residential districts beside the St. Johns River.
11. 32204: 32204 is a zip code encompassing the neighborhood of Ortega in Jacksonville FL. It's a historical and wealthy area known for its shoreline properties and oak-lined streets.
12. 32205: 32205 is a zip code encompassing a big portion of Jacksonville FL's urban core, incorporating the historical Riverside and Avondale neighborhoods. Recognized for its lively arts scene, varied architecture, and walkable streets, 32205 presents a blend of housing, business, and leisure spaces.
13. 32212: 32212 is a zip code encompassing parts of Jacksonville FL's Southside, known for its mix of residential areas and business districts. It offers a variety of housing options, shopping, and restaurants.
14. 32214: This ZIP code is a zip code encompassing parts of Jacksonville's Southside, known for its combination of residential areas and commercial developments. It provides a blend of suburban living with convenient access to shopping, dining, and major roadways.
15. 32215: 32215 is a zip code including a few neighborhoods in Jacksonville FL's Southside area. It is recognized for a blend of housing areas, commercial hubs, and closeness to important roads.
16. 32216: That ZIP code is a zip code encompassing parts of Jacksonville's Southside, noted for its combination of residential zones and commercial developments. It offers a suburban atmosphere with ready access to shopping, dining, and major roadways.
17. 32217: 32217 is a zip code covering a big portion of Mandarin, a suburb in Jacksonville FL famous for its scenic waterfront scenes. It includes a blend of housing neighborhoods, parks, and business developments along the St. Johns River.
18. 32218: 32218 is a zip code covering parts of the Southside area in Jacksonville FL. It is a primarily residential area with a mix of apartments, condos, and single-family houses.
19. 32227: The 32227 zip code covers the Jacksonville Beach area, providing a combination of housing neighborhoods and beachfront attractions. It's known for its calm shoreline lifestyle and popular surfing spots. Jacksonville FL
20. 32228: 32228 is a zip code covering the Jacksonville FL area. It is recognized for its sandy beaches, lively boardwalk, and oceanfront leisure pursuits.
21. 32229: 32229 is a zip code encompassing the Arlington district of Jacksonville FL. It is a big residential and commercial area located east of the St. Johns River.
22. 32235: 32235 is a zip code mainly covering the Arlington area of Jacksonville FL. It's a large residential area with a combination of homes, retail, and commercial businesses.
23. 32236: 32236 is a zip code including the Ocean Way and New Berlin neighborhoods in Jacksonville FL. It's a primarily residential area known for its residential nature and proximity to the Jax International Airport.
24. 32237: That ZIP code is a zip code encompassing a portion of Jacksonville's Southside area. It is known for a combination of residential neighborhoods, business centers, and proximity to the University of North Florida.
25. 32238: 32238 is a zip code encompassing sections of Jacksonville FL's Southside, recognized for its mix of housing and business expansions. It features well-known shopping malls, office complexes, and varied housing options.
26. 32239: 32239 is a zip code including the Kernan area of Jacksonville FL. It is a developing residential area with a mix of housing options and convenient access to services.
27. 32240: 32240 is a zip code including the Argyle Forest neighborhood in Jacksonville FL. This region is known for its family-friendly atmosphere and suburban development.
28. 32241: 32241 is a Jacksonville FL zip code encompassing the Southside Estates area. It is a mainly residential section with a combination of housing choices and easy access to major highways.
29. 32244: 32244 is a zip code including the Jacksonville Beaches region. It includes Neptune Beach, Atlantic Beach, and some of Jacksonville Beach.
30. 32219: 32219 is a zip code linked with the Mandarin area in Jacksonville FL. It's a big housing area recognized for its mix of long-standing areas and newer developments.
31. 32220: 32220 is a zip code including the Argyle Forest neighborhood in Jacksonville FL. This area is a mainly residential area recognized for its family-friendly atmosphere and convenient access to shopping and dining.
32. 32221: The 32221 is a zip code covering parts of of Jacksonville FL's Southside, recognized for its blend of housing developments and business parks. It includes communities like Baymeadows and Deerwood, offering a variety of housing and retail options.
33. 32222: That zip code in Jacksonville, FL covers the Beach Haven and South Beach communities. This area is known for its proximity to the shore and residential communities.
34. 32223: 32223 is a zip code surrounding the Mandarin neighborhood of Jacksonville FL. It is a large housing location known for its past, parks, and proximity to the St. Johns River.
35. 32224: 32224 is a zip code encompassing Jacksonville Beach, a shoreline community known for its sandy beaches. Residents and visitors same enjoy surfing, angling, and a lively promenade scene in Jacksonville FL.
36. 32225: 32225 is a zip code covering Jacksonville FL's Southside neighborhood, known because of its combination of residential areas, commercial centers, and proximity to the St. Johns River. It provides a blend of outskirts living with easy entry to shopping, restaurants, and leisure activities.
37. 32226: 32226 is a zip code encompassing the Southside neighborhood of Jacksonville FL. It's a big, varied region recognized for its commercial centers, housing developments, and closeness to the St. Johns River.
38. 32230: 32230 is a zip code encompassing the Jacksonville FL neighborhoods of Arlington and Fort Caroline. This area offers a mix of housing developments, parks, and historical sites.
39. 32231: 32231 is the zip postal code for Mandarin, a big suburban community in Jacksonville FL known because of its history and picturesque views along the St. Johns River. It offers a combination of housing developments, parks, and commercial centers.
40. 32232: 32232 is the zip code of the Kernan area of Jacksonville FL. It is a growing suburban area known because of its residential areas and proximity to the beach.
41. 32234: 32234 is the zip code of the Mandarin community in Jacksonville FL. It is a big housing area recognized because of its past, parks, and closeness to the St. Johns River.
42. 32245: 32245 is a zip code covering a few neighborhoods in Jacksonville FL, such as the affluent Deerwood area recognized for its gated communities and the large St. Johns Town Center retail and restaurant destination. Residents can appreciate a mix of upscale living, retail accessibility, and proximity to major roadways.
43. 32246: 32246 is a zip code covering the Hodges Boulevard area in Jacksonville FL. It's a primarily housing area with a mix of home choices and business projects.
44. 32247: 32247 is a zip code covering the Mandarin area in Jacksonville FL. It's a big residential location known for its historic origins, riverfront scenery, and welcoming environment.
45. 32250: 32250 is a zip code encompassing a part of Jacksonville's in FL Southside, recognized for its mix of residential areas and commercial developments. It includes parts of the Baymeadows area, offering a range of housing options and easy entry to shopping and restaurants.
46. 32254: 32254 is a postal code encompassing parts of Jacksonville FL's Southside, known for its blend of residential areas and commercial developments. It includes the well-known Deerwood Park and Tinseltown areas.
47. 32255: 32255 is a zip code including several areas in Jacksonville FL's south side area. It features a combination of housing areas, business hubs, and closeness to major roadways.
48. 32256: 32256 is a zip code covering sections of the South Side area in Jacksonville FL. It offers a combination of living spaces, shopping areas, and leisure activities.
49. 32257: 32257 is a zip code covering the Kernan and Hodges Boulevards region of Jacksonville FL. This area is recognized for its residential neighborhoods, shopping centers, and closeness to the University of North Florida.
50. 32258: 32258 is a zip code encompassing portions of Jacksonville FL's Southside, recognized for domestic areas and business projects. It includes neighborhoods like Baymeadows and Deerwood, offering a blend of housing options and convenient access to purchasing and food.
51. 32260: That zip code is a zip code covering Jacksonville FL's Southside area. It features a mix of housing, business properties, and proximity to the St. Johns River.
52. 32277: 32277 is the zip code for Jacksonville FL, a coastal community known for its sandy shores and vibrant boardwalk. It offers a mix of residential areas, hotels, restaurants, and recreational activities.

1. Downtown Jacksonville: Downtown Jacksonville represents the central commercial area of Jacksonville, Florida, known for its vibrant mix of historic architecture and contemporary skyscrapers. It features cultural attractions, riverside parks, and a selection of dining and entertainment options.
2. Southside: Southside is a dynamic district in Jacksonville, FL, known for its combination of housing areas, malls, and business hubs. It offers a mix of city convenience and suburban comfort, making it a well-liked area for residents and professionals.
3. Northside: Northside is a large district in Jacksonville, FL, known for its mixed communities and industrial areas. It features a mix of residential neighborhoods, parks, and commercial zones, aiding the city's growth and development.
4. Westside: Westside is a lively district in Jacksonville, FL, known for its varied community and strong cultural heritage. It features a mix of housing areas, small businesses, and parks, offering a special blend of city and suburban life.
5. Arlington: Arlington is a dynamic district in Jacksonville, FL, known for its mix of residential areas and commercial zones. It features green spaces, shopping centers, and access to the St. Johns River, making it a popular area for families and nature lovers.
6. Mandarin: Mandarin stands as a historic district in Jacksonville, Florida, known for its scenic riverfront views and appealing small-town atmosphere. It boasts lush parks, local shops, and a deep cultural heritage dating back to the 19th century.
7. San Marco: San Marco is a dynamic neighborhood in Jacksonville, FL, known for its historic architecture and charming town center. It offers a mix of unique shops, restaurants, and cultural attractions, making it a well-liked destination for residents and visitors alike.
8. Riverside: Riverside is a lively community in Jacksonville, FL, known for its historic architecture and bustling arts scene. It offers a mix of one-of-a-kind shops, restaurants, and picturesque riverfront parks, making it a favored destination for locals and visitors alike.
9. Avondale: Avondale is a charming neighborhood in Jacksonville, FL, known for its heritage architecture and vibrant local shops. It offers a blend of residential areas, upscale restaurants, and cultural attractions along the St. Johns River.
10. Ortega: Ortega is a historic and scenic neighborhood in Jacksonville, FL, known for its beautiful waterfront homes and shady streets. It offers a charming blend of classic Southern architecture and contemporary amenities, making it a appealing residential area.
11. Murray Hill: Murray Hill is a dynamic historic neighborhood in Jacksonville, FL, known for its charming bungalows and unique local businesses. It offers a blend of residential comfort and a vibrant arts and dining scene, making it a well-liked destination for residents and visitors alike.
12. Springfield: Springfield is a historic neighborhood in Jacksonville, FL, known for its quaint early 20th-century architecture and vibrant community. It features a combination of residential homes, local businesses, and cultural attractions, making it a favored area for both residents and visitors.
13. East Arlington: East Arlington is a lively neighborhood in Jacksonville, FL, known for its diverse community and accessible access to shopping and recreational areas. It features a blend of houses, green spaces, and shops, making it a desirable place to live.
14. Fort Caroline: Fort Caroline is a historic district in Jacksonville, FL, known for its rich colonial history and proximity to the site of the 16th-century French fort. It includes a blend of residential areas, parks, and cultural landmarks that reflect its heritage.
15. Greater Arlington: Greater Arlington in Jacksonville, FL, is a dynamic district known for its housing areas, malls, and recreational areas. It offers a blend of suburban living with easy access to downtown Jacksonville and coastal areas.
16. Intracoastal West: Intracoastal West is a dynamic neighborhood in Jacksonville, FL, known for its picturesque waterways and nearness to the Intracoastal Waterway. It offers a blend of homes and businesses, providing a special mix of city convenience and natural beauty.
17. Jacksonville Beaches: Jacksonville Beaches remains a lively coastal locale in Jacksonville, FL, known for its lovely beaches and peaceful atmosphere. It provides a mix of living communities, nearby stores, and leisure activities along the Atlantic Ocean.
18. Neptune Beach: Neptune Beach is a pleasant beachside community located in Jacksonville FL, known for its gorgeous beaches and calm atmosphere. It offers a combination of residential neighborhoods, local shops, and dining options, making it a well-liked destination for both residents and visitors.
19. Atlantic Beach: Atlantic Beach is a beachside community located in Jacksonville, Florida, known for its stunning beaches and laid-back atmosphere. It offers a mix of residential areas, local shops, and outdoor recreational activities along the Atlantic Ocean.
20. Jackson Beach: Jacksonville Beach is a dynamic seaside community in Jacksonville, FL, known for its gorgeous beaches and lively boardwalk. It offers a variety of residential neighborhoods, local shops, restaurants, and recreational activities, making it a favored destination for both residents and visitors.
21. Baldwin: Baldwin is a modest community located within Duval County, near Jacksonville FL, Florida, known for its traditional charm and close-knit community. It features a combination of residential areas, local businesses, and scenic parks, offering a calm, suburban atmosphere.
22. Oceanway: Oceanway is a residential neighborhood in Jacksonville, Florida, known for its suburban atmosphere and kid-friendly amenities. It features a range of housing options, parks, and local businesses, making it a favored area for residents seeking a community-oriented environment.
23. South Jacksonville: South Jacksonville is a dynamic district in Jacksonville, FL, known for its housing areas and local shops. It offers a blend of historic charm and modern amenities, making it a well-liked area for families and working individuals.
24. Deerwood: Deerwood is a well-known neighborhood in Jacksonville, FL, known for its high-end residential communities and manicured green spaces. It offers a mix of premium homes, golf courses, and convenient access to shopping and dining options.
25. Baymeadows: Baymeadows is a lively district in Jacksonville, FL, known for its mix of residential neighborhoods and commercial areas. It offers a variety of shopping, dining, and recreational options, making it a favored destination for locals and visitors alike.
26. Bartram Park: Bartram Park is a dynamic neighborhood in Jacksonville, FL, known for its up-to-date residential communities and nearness to nature. It offers a blend of urban amenities and outdoor recreational activities, making it a popular choice for families and professionals.
27. Nocatee: Nocatee is a planned community located near Jacksonville, FL, known for its welcoming atmosphere and comprehensive amenities. It features parks, trails, and recreational facilities, making it a preferred choice for residents seeking a vibrant suburban lifestyle.
28. Brooklyn: Brooklyn is a vibrant district in Jacksonville, FL, known for its historic charm and friendly community. It offers a mix of houses, shops, and historic sites that highlight the area's cultural wealth.
29. LaVilla: LaVilla is a historic area in Jacksonville FL, known because of its rich cultural legacy and vibrant arts scene. Formerly a thriving African American society, it had a major role in the city's music and entertainment history.
30. Durkeeville: Durkeeville is a historic in Jacksonville, Florida, known for its rich African American heritage and thriving community. It features a mix of residential areas, local businesses, and cultural landmarks that represent its deep roots in the city's history.
31. Fairfax: Fairfax is a dynamic neighborhood in Jacksonville, FL, known for its historic charm and close-knit community. It features a mix of residences, local businesses, and green spaces, offering a inviting atmosphere for residents and visitors alike.
32. Lackawanna: Lackawanna is a living neighborhood in Jacksonville, Florida, known for its quiet streets and friendly atmosphere. It features a mix of private residences and neighborhood shops, contributing to its cozy vibe within the city.
33. New Town: New Town is a noted neighborhood in Jacksonville, FL, recognized for its vibrant community spirit and rich cultural heritage. It offers a mix of residential areas, local businesses, and community organizations working to improve and upgrade the district.
34. Panama Park: Panama Park is a residential neighborhood in Jacksonville, FL, known for its peaceful streets and friendly atmosphere. It offers convenient access to local services and parks, making it an appealing area for families and professionals.
35. Talleyrand: Talleyrand is a historic neighborhood in Jacksonville, Florida, known for its residential charm and proximity to the St. Johns River. The area boasts a mix of vintage homes and local businesses, reflecting its strong community heritage.
36. Dinsmore: Dinsmore is a living neighborhood located in Jacksonville, Florida, known for its peaceful streets and friendly atmosphere. It features a mix of single-family homes and local amenities, offering a suburban feel within the city.
37. Garden City: Garden City is a lively neighborhood in Jacksonville, FL, known for its mix of houses and local businesses. It offers a close-knit community atmosphere with convenient access to city amenities.
38. Grand Park: Grand Park is a vibrant neighborhood in Jacksonville, Florida, known for its historic charm and varied community. It features leafy streets, local parks, and a range of small businesses that contribute to its welcoming atmosphere.
39. Highlands: Highlands is a dynamic neighborhood in Jacksonville, FL known for its pleasant residential streets and local parks. It offers a mix of historic homes and modern amenities, creating a inviting community atmosphere.
40. Lake Forest: Lake Forest is a living neighborhood located in Jacksonville, Florida, known for its quiet streets and kid-friendly atmosphere. It features a mix of detached houses, parks, and local amenities, making it a appealing community for residents.
41. Paxon: Paxon is a living neighborhood located in the west part of Jacksonville, Florida, known for its varied community and budget-friendly housing. It features a mix of single-family homes and local businesses, contributing to its friendly, suburban atmosphere.
42. Ribault: Ribault is a dynamic neighborhood in Jacksonville, Florida, known for its diverse community and homey feel. It features a mix of classic homes and local businesses, contributing to its unique cultural identity.
43. Sherwood Forest: Sherwood Forest is a living neighborhood in Jacksonville, FL, known for its leafy streets and kid-friendly atmosphere. It features a mix of traditional and contemporary homes, offering a tranquil suburban feel close to city amenities.
44. Whitehouse: Whitehouse is a residential neighborhood located in Jacksonville, Florida, known for its peaceful streets and neighborly atmosphere. It features a mix of detached houses and local amenities, making it a well-liked area for families and professionals.
45. Cedar Hills: Cedar Hills is a thriving neighborhood in Jacksonville, FL, known for its diverse community and convenient access to local amenities. It offers a blend of residential and commercial areas, adding to its energetic and welcoming environment.
46. Grove Park: Grove Park is a residential neighborhood in Jacksonville, Florida, known for its lovely historic homes and canopied streets. It offers a friendly community atmosphere with easy access to downtown facilities and parks.
47. Holiday Hill: Holiday Hill is a living neighborhood in Jacksonville, Florida, known for its quiet streets and tight-knit community. It offers easy access to local parks, schools, and shopping centers, making it a attractive area for families.
48. Southwind Lakes: Southwind Lakes is a living neighborhood in Jacksonville, FL known for its tranquil lakes and carefully kept community spaces. It offers a peaceful suburban atmosphere with easy access to local amenities and parks.
49. Secret Cove: Secret Cove is a serene waterfront neighborhood in Jacksonville, FL, known for its calm atmosphere and beautiful views. It offers a combination of residential homes and natural landscapes, making it a well-liked spot for outdoor enthusiasts and families.
50. Englewood: Englewood is a dynamic neighborhood in Jacksonville, FL, known for its varied community and deep cultural heritage. It offers a mix of residential areas, local businesses, and recreational spaces, making it a lively part of the city.
51. St Nicholas: St. Nicholas is a historic neighborhood in Jacksonville, Florida, known for its delightful early 20th-century architecture and vibrant community atmosphere. It offers a mix of residential homes, local businesses, and cultural landmarks, making it a unique and inviting area within the city.
52. San Jose: San Jose is a vibrant district in Jacksonville, FL, known for its housing areas and shopping zones. It offers a combination of suburban lifestyle with close proximity to parks, retail options, and dining.
53. Pickwick Park: Pickwick Park is a living neighborhood in Jacksonville FL, known for its quiet streets and neighborly atmosphere. It includes a mix of detached houses and local amenities, making it a desirable area for families and professionals.
54. Lakewood: Lakewood is a lively neighborhood in Jacksonville, FL known for its classic charm and diverse community. It features a mix of houses, local businesses, and parks, offering a inviting atmosphere for residents and visitors alike.
55. Galway: Galway is a housing neighborhood in Jacksonville, FL, known for its residential atmosphere and community-oriented living. It features a mix of single-family homes and local amenities, providing a quiet and family-friendly environment.
56. Beauclerc: Beauclerc is a residential neighborhood in Jacksonville, Florida, known for its peaceful streets and welcoming atmosphere. It offers a mix of detached houses and local amenities, making it a popular choice for residents seeking a suburban feel within the city.
57. Goodby's Creek: Goodby's Creek is a residential neighborhood in Jacksonville, FL, known for its tranquil atmosphere and proximity to the outdoors. It offers a mix of residential living with easy access to nearby amenities and parks.
58. Loretto: Loretto is a classic neighborhood in Jacksonville, Florida, known for its charming residential streets and friendly community atmosphere. It features a blend of architectural styles and offers convenient access to downtown Jacksonville and nearby parks.
59. Sheffield: Sheffield is a housing neighborhood in Jacksonville, FL, known for its peaceful streets and friendly atmosphere. It features a combination of private residences and local parks, making it a popular area for families.
60. Sunbeam: Sunbeam is a dynamic neighborhood in Jacksonville, FL, known for its quaint residential streets and strong community spirit. It offers a mix of historic homes and local businesses, creating a inviting atmosphere for residents and visitors alike.
61. Killarney Shores: Killarney Shores is a residential neighborhood in Jacksonville FL, Florida, famous for its peaceful streets and friendly community. It provides convenient access to nearby parks, schools, and shopping centers, making it a attractive area for families.
62. Royal Lakes: Royal Lakes is a residential neighborhood in Jacksonville FL, known for its peaceful environment and family-friendly atmosphere. It features well-maintained homes, local parks, and easy access to nearby schools and shopping centers.
63. Craig Industrial Park: Craig Industrial Park is a industrial and manufacturing area in Jacksonville, FL, known for its variety of warehouses, production plants, and logistics hubs. It serves as a vital hub for area companies and contributes greatly to the city's economy.
64. Eastport: Eastport is a dynamic neighborhood in Jacksonville, FL, known for its historic charm and waterside views. It offers a mix of residential areas, local businesses, and recreational spaces along the St. Johns River.
65. Yellow Bluff: Yellow Bluff is a residential neighborhood in Jacksonville, Florida, known for its quiet streets and friendly community. It offers a mix of suburban homes and nearby amenities, providing a cozy living environment.
66. Normandy Village: Normandy Village is a living neighborhood in Jacksonville, FL, recognized for its mid-20th-century residences and kid-friendly atmosphere. It features easy access to local recreational areas, schools, and malls, making it a popular choice for residents.
67. Argyle Forest: Argyle Forest stands as a residential community in Jacksonville, FL, recognized for its family-oriented atmosphere and easy access to shopping and schools. It offers a variety of single-family homes, parks, and recreational facilities, which makes it a popular choice for living in the suburbs.
68. Cecil Commerce Center: Cecil Commerce Center is a large business district in Jacksonville, Florida, known for its prime location and comprehensive transportation infrastructure. It serves as a center for logistics, manufacturing, & distribution businesses, playing a key role in the local economy.
69. Venetia: Venetia is a residential neighborhood in Jacksonville, Florida, known for its quiet streets and suburban atmosphere. It offers easy access to nearby parks, schools, and shopping centers, making it a popular area for families.
70. Ortega Forest: Ortega Forest is a lovely neighborhood community in Jacksonville, FL, known for its historic homes and green, tree-covered streets. It offers a peaceful suburban atmosphere while being conveniently close to downtown Jacksonville.
71. Timuquana: Timuquana is a residential neighborhood located in Jacksonville, Florida, known for its tranquil streets and local parks. It offers a variety of detached houses and convenient access to nearby amenities and schools.
72. San Jose Forest: San Jose Forest is a residential neighborhood located in Jacksonville, Florida, known for its lush greenery and kid-friendly atmosphere. The area features a variety of private residences and local parks, offering a serene suburban environment.
73. E-Town: E-Town is a lively neighborhood located in Jacksonville, Florida, known for its varied community and historical significance. It features a blend of residential areas, local businesses, and cultural landmarks that add to its unique character.

• Cummer Museum of Art and Gardens: This Cummer Museum of Art and Gardens exhibits a broad collection of art covering multiple periods and cultures. Guests can also wander stunning formal gardens overlooking the St. Johns River in Jacksonville FL.
• Jacksonville Zoo and Gardens: Jacksonville Zoo and Gardens presents a diverse range of animals and flora from around the globe. It offers interesting exhibits, instructive programs, and preservation efforts for visitors of all ages. Jacksonville FL
• Museum of Science and History: This Museum of Science & History in Jacksonville FL features hands-on exhibits and a planetarium appropriate for all ages. Visitors can discover science, history, and culture through interesting displays and informative programs.
• Kingsley Plantation: Kingsley Plantation is a historical site that offers a glimpse into Florida's plantation history, encompassing the lives of enslaved people and the planter family. Visitors can tour the grounds, including the slave quarters, plantation house, and barn. Jacksonville FL
• Fort Caroline National Memorial: Fort Caroline National Memorial remembers the 16th-century French try to create a colony in Florida. It offers displays and paths investigating the history and natural environment of the area in Jacksonville FL.
• Timucuan Ecological and Historic Preserve: Timucuan Ecological and Historic Preserve protects one of the remaining unspoiled coastal marshes on the Atlantic Coast. It preserves the history of the Timucuan Indians, European explorers, and plantation owners.
• Friendship Fountain: Friendship Fountain is a huge, famous water fountain in Jacksonville FL. It showcases impressive water shows and lights, making it a popular attraction and gathering place.
• Riverside Arts Market: Riverside Arts Market in Jacksonville FL, is a lively week-to-week arts and crafts marketplace under the Fuller Warren Bridge. It features regional artisans, on-stage music, food sellers, and a beautiful scene of the St. Johns River.
• San Marco Square: San Marco Square is a charming shopping and eating area with a European-inspired atmosphere. It is renowned for its high-end boutiques, restaurants, and the iconic fountain featuring lions. Jacksonville FL
• St Johns Town Center: St. Johns Town Center is an high-end open-air retail center in Jacksonville FL, featuring a blend of luxury retailers, popular brands, and eateries. It is a leading spot for purchasing, eating, and entertainment in North East Florida.
• Avondale Historic District: Avondale Historic District displays delightful early 20th-century architecture and boutique shops. It's a vibrant neighborhood known for its nearby restaurants and historical character. Jacksonville FL
• Treaty Oak Park: Treaty Oak Park is a gorgeous green space in Jacksonville FL, home to a giant, centuries-old oak tree. The park offers a calm escape with trails and picturesque views of the St. Johns River.
• Little Talbot Island State Park: Little Talbot Island State Park in Jacksonville FL offers immaculate beaches and diverse ecosystems. Guests can partake in activities like hiking, camping, and wildlife viewing in this unspoiled coastal setting.
• Big Talbot Island State Park: Big Talbot Island State Park in Jacksonville FL, provides amazing shoreline scenery and diverse ecosystems for nature enthusiasts. Discover the one-of-a-kind boneyard beach, hike scenic trails, and observe abundant wildlife in this lovely wildlife sanctuary.
• Kathryn Abbey Hanna Park: Kathryn Abbey Hanna Park in Jacksonville FL, provides a gorgeous beach, forested paths, and a 60-acre fresh water lake for leisure. It's a favored spot for camping, surfing, kayaking, and biking.
• Jacksonville Arboretum and Gardens: Jacksonville Arboretum and Gardens offers a beautiful ecological getaway with varied trails and themed gardens. Visitors can discover a variety of plant life and savor serene outdoor recreation.
• Memorial Park: Memorial Park is a 5.25-acre park that serves as a homage to the more than 1,200 Floridians who gave their lives in World War I. The area features a sculpture, reflecting pool, and gardens, offering a space for memory and thought. Jacksonville FL
• Hemming Park: Hemming Park is Jacksonville FL's most ancient park, a historical public square hosting events, bazaars, and social gatherings. It provides a green space in the heart of downtown with art installations and a lively atmosphere.
• Metropolitan Park: Metropolitan Park in Jacksonville FL offers a stunning waterfront setting for events and recreation. With playgrounds, a concert venue, and picturesque views, it is a popular destination for locals and tourists as well.
• Confederate Park: Confederate Park in Jacksonville FL, was initially designated to honor Confederate soldiers and sailors. It has since been redesignated and transformed as a space for community events and recreation.
• Beaches Museum and History Park: Beaches Museum & History Park protects and shares the unique history of Jacksonville's beaches. Investigate exhibits on local life-saving, surfing, and original beach communities.
• Atlantic Beach: Atlantic Beach provides a delightful coastal community with beautiful beaches and a calm atmosphere. People can enjoy surfing, swimming, and exploring local shops and restaurants near Jacksonville FL.
• Neptune Beach: Neptune Beach provides a typical Florida beach town feeling with its grainy shores and laid-back atmosphere. People can experience surfing, swimming, and discovering nearby shops and restaurants near Jacksonville FL.
• Jacksonville Beach: Jacksonville Beach is a lively shoreline city known because of its sandy shores and surf scene. It offers a mix of recreational activities, dining, and nightlife beside the Atlantic Ocean.
• Huguenot Memorial Park: This park provides a beautiful beachfront spot with opportunities for campgrounds, fishing, and birdwatching. Guests can savor the natural allure of the region with its diverse wildlife and scenic coastal views in Jacksonville FL.
• Castaway Island Preserve: Castaway Island Preserve in Jacksonville FL, provides picturesque trails and walkways through varied ecosystems. Visitors can enjoy nature walks, bird watching, and discovering the beauty of the coastal area.
• Yellow Bluff Fort Historic State Park: Yellow Bluff Fort Historic State Park in Jacksonville FL preserves the earthen remains of a Civil War Southern fort. Visitors can explore the historic site and discover about its meaning by way of informative displays.
• Mandarin Museum & Historical Society: The Mandarin Museum & Historical Society safeguards the past of the Mandarin in Jacksonville FL. Visitors are able to view exhibits and relics that highlight the area's unique history.
• Museum of Southern History: The Museum of Southern History exhibits relics and displays connected to the history and culture of the Southern United States. Visitors are able to investigate a range of topics, including the Civil War, slavery, and Southern art and literature. Jacksonville FL
• The Catty Shack Ranch Wildlife Sanctuary: The Catty Shack Ranch Wildlife Sanctuary in Jacksonville FL, offers guided foot tours to view rescued big cats and other uncommon animals. It's a non-profit organization dedicated to providing a secure, caring, forever home for these animals.

Bold City Heating & Air

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8400 Baymeadows Way Suite 1, Jacksonville, FL 32256, United States

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That Florida sun? It doesn’t play. Prepping your HVAC system now means cool breezes later. Clean filters ✔️ Check refrigerant ✔️ Program thermostats ✔️ 🔥 Be heatwave-ready with Bold City Heating & Air! Book your seasonal check-up and beat the summer rush!

3 days ago

Updates from customers

Randolph and the crew were so nice and they did a AWESOME Job of putting in new ductwork & installation. Great group of guys. RT would answer any questions you had. Felt comfortable with them in my home. From the girl at the front desk to everyone involved Thank You!! I Appreciate you all. I definitely would recommend this company to anyone 😊

a year ago

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Why would an AC heater not be turning on?

An AC heater may not turn on due to power issues like tripped circuit breakers, blown fuses, or loose wiring, thermostat problems such as dead batteries, incorrect settings, or a faulty unit, or safety features engaging due to clogged filte …

6 months ago

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4.9

1,687 reviews

"Best price and service I have ever had with an HVAC partner"

"Excellent workmanship, knowledgeable, friendly staff from owner to employees."

"They’ve been charging the service contract now the unit does not work."

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Abe Fernandez

11 reviews · 11 photos

a week ago

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DO NOT HIRE THIS COMPANY. TOOK THEM TO COURT AND WON!

We hired Bold City Heating and Air to replace all our air ducts, and the work they performed was shockingly defective. After the job was done we noticed that … More

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Kenneth Jefferson

5 reviews · 3 photos

2 months ago

Jacob; Ben & Josie were very professional and efficient. If I could give 10 stars I would. Very knowledgeable and they kept me informed throughout the whole process of my complete AC installation. The entire process was easy with Bold City … More

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Response from the owner 2 months ago

Thank you so much for your fantastic 5-star review, Kenneth & Monique! We're thrilled to hear that Jacob, Ben, and Josie provided you with professional and efficient service during your complete AC installation. At Bold City Heating & Air, … More

WILLIAM MOSIER

2 reviews · 4 photos

a month ago

Crew showed up on time got done earlier than expected. Everything was clean. They were quiet. I was able to work throughout the day while they were installing. Couldn’t have been more perfect. Happy with the service.

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Response from the owner a month ago

Thank you so much for your fantastic 5-star review, William! We're thrilled to hear that our team at Bold City Heating & Air made the installation process seamless and respectful of your work day. We appreciate your support and are glad you’re happy with our service! Let us know if you need anything else in the future!

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Bold City Heating & Air

HVAC & Air Conditioning Repair in Jacksonville, FL

Bold City offers premium HVAC service and competitive pricing to the Jacksonville, Jacksonville Beaches and Ponte Vedra areas.

24/7 Fast and Reliable. Jacksonville Grown. Family Owned & Operated.

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Summer HVAC Tune Up for Just $89

Get your system ready for the heat!

We’ll inspect, clean, and fine tune your HVAC to boost efficiency, prevent breakdowns, and keep you cool all season long.

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Jacksonville’s Best HVAC Company

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At Bold City Heating & Air, we offer our customers exceptional service when it comes to HVAC in Jacksonville, FL.

From heating and cooling repairs to energy-efficient HVAC installations that save you money, we do it all. When we opened our family-owned business in 2016, we knew we wanted to be the best around and that’s a passion that still stands.

From the moment you call us to the moment we carry out our work, you can depend on us. We believe in clear upfront pricing, no hidden costs, and the highest level of workmanship. With our NATE-certified technicians and Energy Star systems we give you the perfect combination of choice, value, and customer care.
“Experience the Bold Difference” that is Bold City Heating & Air by calling us today!

We Believe In:

Clear Upfront Pricing

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High-Level Workmanship

Trusted Heating and Air Pros in Jacksonville

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When it comes to heating and air services in Jacksonville, we offer all the services you need under one roof. But that’s not where our story ends.

From your HVAC system to your ducts and indoor air quality we offer a complete end-to-end solution. Our team is at the heart of everything we do. Our continuous program of education and training ensures our technicians are the best they can be. It also means our entire team stays up to date with the latest systems and technology. From our Energy Star systems to our whole-house approach, you can depend on every service and product we have to offer.

Our educated and experienced HVAC technicians specialize in a broad range of air conditioning, heating & indoor air quality solutions. We are dedicated to finding the right fit for your home or business. Our broad range of expertise ensures a solution to every challenge.

Satisfaction Guaranteed

Prioritizing satisfaction, Bold City Heating & Air exemplifies customer service.

Our Team Will:

• Keep Your Informed
• Target Your Goals

• Provide Honest Answers

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Heating

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Number One For Heating & Cooling

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Keeping you comfortable is our top priority!

When you need an HVAC contractor backed by generations of experience and who truly cares about your satisfaction, turn to Bold City Heating & Air. From air conditioning repairs to the installation of a new energy-efficient heating system, you can depend on our team. We’ll get to you as quickly as we can to solve any problem you might be experiencing.

If you need help with HVAC installation or replacement, we’ll recommend the perfect system and provide you with a competitive quote. We’ll help you to save money on your energy costs going forward and can even help with financing on approved credit.

Jacksonville Grown. Family Owned & Operated.

See What Our Customers Are Saying About Us!

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Recently moved here from MD and was not familiar with the heating/AC unit. Bold City, especially Sam Powel, has been VERY helpful. In our short time here in FL, we have recommended Bold City to acquaintances numerous times, and will continue to do so.

Paul G.

Another excellent job by Bold City. Bryan was on time, thorough, explained his analysis and solution, and completed the job. He demonstrated knowledge and expertise while providing a high level of customer service. Well done!!

John L.

Recently moved here from MD and was not familiar with the heating/AC unit. Bold City, especially Sam Powel, has been VERY helpful. In our short time here in FL, we have recommended Bold City to acquaintances numerous times, and will continue to do so.

Paul G.

Another excellent job by Bold City. Bryan was on time, thorough, explained his analysis and solution, and completed the job. He demonstrated knowledge and expertise while providing a high level of customer service. Well done!!

John L.

Recently moved here from MD and was not familiar with the heating/AC unit. Bold City, especially Sam Powel, has been VERY helpful. In our short time here in FL, we have recommended Bold City to acquaintances numerous times, and will continue to do so.

Paul G.

An HVAC Team You Can Trust

---

When you’re looking for an HVAC company that you can count on, look no further than Bold City Heating & Air.

Why not try out our award-winning service for yourself? We promise to never give you the upsell. Our technicians don’t get paid commission and we don’t focus on profit margins. We know that if we give our customers the best service, our profits will look after themselves. Whether you’re looking for heating and cooling repairs in Jacksonville or you need HVAC installation or maintenance, speak to our friendly family-owned team.

We’re proud to offer our high quality HVAC services to the residents of Jacksonville. Contact our team at Bold City Heating & Air today and experience our great service for yourself!

Contact Your Bold City Specialist Today

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Air conditioning

From Wikipedia, the free encyclopedia

This article is about cooling of air. For the Curved Air album, see Air Conditioning (album). For a similar device capable of both cooling and heating, see Heat pump.

"a/c" redirects here. For the abbreviation used in banking and book-keeping, see Account (disambiguation). For other uses, see AC.

There are various types of air conditioners. Popular examples include: Window-mounted air conditioner (China, 2023); Ceiling-mounted cassette air conditioner (China, 2023); Wall-mounted air conditioner (Japan, 2020); Ceiling-mounted console (Also called ceiling suspended) air conditioner (China, 2023); and portable air conditioner (Vatican City, 2018).

Air conditioning, often abbreviated as A/C (US) or air con (UK),^[1] is the process of removing heat from an enclosed space to achieve a more comfortable interior temperature and in some cases also controlling the humidity of internal air. Air conditioning can be achieved using a mechanical 'air conditioner' or through other methods, including passive cooling and ventilative cooling.^[2][3] Air conditioning is a member of a family of systems and techniques that provide heating, ventilation, and air conditioning (HVAC).^[4] Heat pumps are similar in many ways to air conditioners but use a reversing valve, allowing them to both heat and cool an enclosed space.^[5]

Air conditioners, which typically use vapor-compression refrigeration, range in size from small units used in vehicles or single rooms to massive units that can cool large buildings.^[6] Air source heat pumps, which can be used for heating as well as cooling, are becoming increasingly common in cooler climates.

Air conditioners can reduce mortality rates due to higher temperature.^[7] According to the International Energy Agency (IEA) 1.6 billion air conditioning units were used globally in 2016.^[8] The United Nations called for the technology to be made more sustainable to mitigate climate change and for the use of alternatives, like passive cooling, evaporative cooling, selective shading, windcatchers, and better thermal insulation.

History

[edit]

Air conditioning dates back to prehistory.^[9] Double-walled living quarters, with a gap between the two walls to encourage air flow, were found in the ancient city of Hamoukar, in modern Syria.^[10] Ancient Egyptian buildings also used a wide variety of passive air-conditioning techniques.^[11] These became widespread from the Iberian Peninsula through North Africa, the Middle East, and Northern India.^[12]

Passive techniques remained widespread until the 20th century when they fell out of fashion and were replaced by powered air conditioning. Using information from engineering studies of traditional buildings, passive techniques are being revived and modified for 21st-century architectural designs.^[13][12]

Air conditioners allow the building's indoor environment to remain relatively constant, largely independent of changes in external weather conditions and internal heat loads. They also enable deep plan buildings to be created and have allowed people to live comfortably in hotter parts of the world.^[14]

Development

[edit]

Preceding discoveries

[edit]

In 1558, Giambattista della Porta described a method of chilling ice to temperatures far below its freezing point by mixing it with potassium nitrate (then called "nitre") in his popular science book Natural Magic.^[15][16][17] In 1620, Cornelis Drebbel demonstrated "Turning Summer into Winter" for James I of England, chilling part of the Great Hall of Westminster Abbey with an apparatus of troughs and vats.^[18] Drebbel's contemporary Francis Bacon, like della Porta a believer in science communication, may not have been present at the demonstration, but in a book published later the same year, he described it as "experiment of artificial freezing" and said that "Nitre (or rather its spirit) is very cold, and hence nitre or salt when added to snow or ice intensifies the cold of the latter, the nitre by adding to its cold, but the salt by supplying activity to the cold of the snow."^[15]

In 1758, Benjamin Franklin and John Hadley, a chemistry professor at the University of Cambridge, conducted experiments applying the principle of evaporation as a means to cool an object rapidly. Franklin and Hadley confirmed that the evaporation of highly volatile liquids (such as alcohol and ether) could be used to drive down the temperature of an object past the freezing point of water. They experimented with the bulb of a mercury-in-glass thermometer as their object. They used a bellows to speed up the evaporation. They lowered the temperature of the thermometer bulb down to −14 °C (7 °F) while the ambient temperature was 18 °C (64 °F). Franklin noted that soon after they passed the freezing point of water 0 °C (32 °F), a thin film of ice formed on the surface of the thermometer's bulb and that the ice mass was about 6 mm (1⁄4 in) thick when they stopped the experiment upon reaching −14 °C (7 °F). Franklin concluded: "From this experiment, one may see the possibility of freezing a man to death on a warm summer's day."^[19]

The 19th century included many developments in compression technology. In 1820, English scientist and inventor Michael Faraday discovered that compressing and liquefying ammonia could chill air when the liquefied ammonia was allowed to evaporate.^[20] In 1842, Florida physician John Gorrie used compressor technology to create ice, which he used to cool air for his patients in his hospital in Apalachicola, Florida. He hoped to eventually use his ice-making machine to regulate the temperature of buildings.^[20][21] He envisioned centralized air conditioning that could cool entire cities. Gorrie was granted a patent in 1851,^[22] but following the death of his main backer, he was not able to realize his invention.^[23] In 1851, James Harrison created the first mechanical ice-making machine in Geelong, Australia, and was granted a patent for an ether vapor-compression refrigeration system in 1855 that produced three tons of ice per day.^[24] In 1860, Harrison established a second ice company. He later entered the debate over competing against the American advantage of ice-refrigerated beef sales to the United Kingdom.^[24]

First devices

[edit]

Electricity made the development of effective units possible. In 1901, American inventor Willis H. Carrier built what is considered the first modern electrical air conditioning unit.^{[25][26][27][28]} In 1902, he installed his first air-conditioning system, in the Sackett-Wilhelms Lithographing & Publishing Company in Brooklyn, New York.^[29] His invention controlled both the temperature and humidity, which helped maintain consistent paper dimensions and ink alignment at the printing plant. Later, together with six other employees, Carrier formed The Carrier Air Conditioning Company of America, a business that in 2020 employed 53,000 people and was valued at $18.6 billion.^[30][31]

In 1906, Stuart W. Cramer of Charlotte, North Carolina, was exploring ways to add moisture to the air in his textile mill. Cramer coined the term "air conditioning" in a patent claim which he filed that year, where he suggested that air conditioning was analogous to "water conditioning", then a well-known process for making textiles easier to process.^[32] He combined moisture with ventilation to "condition" and change the air in the factories; thus, controlling the humidity that is necessary in textile plants. Willis Carrier adopted the term and incorporated it into the name of his company.^[33]

Domestic air conditioning soon took off. In 1914, the first domestic air conditioning was installed in Minneapolis in the home of Charles Gilbert Gates. It is, however, possible that the considerable device (c. 2.1 m × 1.8 m × 6.1 m; 7 ft × 6 ft × 20 ft) was never used, as the house remained uninhabited^[20] (Gates had already died in October 1913.)

In 1931, H.H. Schultz and J.Q. Sherman developed what would become the most common type of individual room air conditioner: one designed to sit on a window ledge. The units went on sale in 1932 at US$10,000 to $50,000 (the equivalent of $200,000 to $1,200,000 in 2024.)^[20] A year later, the first air conditioning systems for cars were offered for sale.^[34] Chrysler Motors introduced the first practical semi-portable air conditioning unit in 1935,^[35] and Packard became the first automobile manufacturer to offer an air conditioning unit in its cars in 1939.^[36]

Further development

[edit]

Innovations in the latter half of the 20th century allowed more ubiquitous air conditioner use. In 1945, Robert Sherman of Lynn, Massachusetts, invented a portable, in-window air conditioner that cooled, heated, humidified, dehumidified, and filtered the air.^[37] The first inverter air conditioners were released in 1980–1981.^[38][39]

In 1954, Ned Cole, a 1939 architecture graduate from the University of Texas at Austin, developed the first experimental "suburb" with inbuilt air conditioning in each house. 22 homes were developed on a flat, treeless track in northwest Austin, Texas, and the community was christened the 'Austin Air-Conditioned Village.' The residents were subjected to a year-long study of the effects of air conditioning led by the nation’s premier air conditioning companies, builders, and social scientists. In addition, researchers from UT’s Health Service and Psychology Department studied the effects on the "artificially cooled humans." One of the more amusing discoveries was that each family reported being troubled with scorpions, the leading theory being that scorpions sought cool, shady places. Other reported changes in lifestyle were that mothers baked more, families ate heavier foods, and they were more apt to choose hot drinks.^[40][41]

Air conditioner adoption tends to increase above around $10,000 annual household income in warmer areas.^[42] Global GDP growth explains around 85% of increased air condition adoption by 2050, while the remaining 15% can be explained by climate change.^[42]

As of 2016 an estimated 1.6 billion air conditioning units were used worldwide, with over half of them in China and USA, and a total cooling capacity of 11,675 gigawatts.^[8][43] The International Energy Agency predicted in 2018 that the number of air conditioning units would grow to around 4 billion units by 2050 and that the total cooling capacity would grow to around 23,000 GW, with the biggest increases in India and China.^[8] Between 1995 and 2004, the proportion of urban households in China with air conditioners increased from 8% to 70%.^[44] As of 2015, nearly 100 million homes, or about 87% of US households, had air conditioning systems.^[45] In 2019, it was estimated that 90% of new single-family homes constructed in the US included air conditioning (ranging from 99% in the South to 62% in the West).^[46][47]

Operation

[edit]

Operating principles

[edit]

Main article: Vapor-compression refrigeration

Cooling in traditional air conditioner systems is accomplished using the vapor-compression cycle, which uses a refrigerant's forced circulation and phase change between gas and liquid to transfer heat.^[48][49] The vapor-compression cycle can occur within a unitary, or packaged piece of equipment; or within a chiller that is connected to terminal cooling equipment (such as a fan coil unit in an air handler) on its evaporator side and heat rejection equipment such as a cooling tower on its condenser side. An air source heat pump shares many components with an air conditioning system, but includes a reversing valve, which allows the unit to be used to heat as well as cool a space.^[50]

Air conditioning equipment will reduce the absolute humidity of the air processed by the system if the surface of the evaporator coil is significantly cooler than the dew point of the surrounding air. An air conditioner designed for an occupied space will typically achieve a 30% to 60% relative humidity in the occupied space.^[51]

Most modern air-conditioning systems feature a dehumidification cycle during which the compressor runs. At the same time, the fan is slowed to reduce the evaporator temperature and condense more water. A dehumidifier uses the same refrigeration cycle but incorporates both the evaporator and the condenser into the same air path; the air first passes over the evaporator coil, where it is cooled^[52] and dehumidified before passing over the condenser coil, where it is warmed again before it is released back into the room.^{[citation needed]}

Free cooling can sometimes be selected when the external air is cooler than the internal air. Therefore, the compressor does not need to be used, resulting in high cooling efficiencies for these times. This may also be combined with seasonal thermal energy storage.^[53]

Heating

[edit]

Main article: Heat pump

Some air conditioning systems can reverse the refrigeration cycle and act as an air source heat pump, thus heating instead of cooling the indoor environment. They are also commonly referred to as "reverse cycle air conditioners". The heat pump is significantly more energy-efficient than electric resistance heating, because it moves energy from air or groundwater to the heated space and the heat from purchased electrical energy. When the heat pump is in heating mode, the indoor evaporator coil switches roles and becomes the condenser coil, producing heat. The outdoor condenser unit also switches roles to serve as the evaporator and discharges cold air (colder than the ambient outdoor air).

Most air source heat pumps become less efficient in outdoor temperatures lower than 4 °C or 40 °F.^[54] This is partly because ice forms on the outdoor unit's heat exchanger coil, which blocks air flow over the coil. To compensate for this, the heat pump system must temporarily switch back into the regular air conditioning mode to switch the outdoor evaporator coil back to the condenser coil, to heat up and defrost. Therefore, some heat pump systems will have electric resistance heating in the indoor air path that is activated only in this mode to compensate for the temporary indoor air cooling, which would otherwise be uncomfortable in the winter.

Newer models have improved cold-weather performance, with efficient heating capacity down to −14 °F (−26 °C).^[55][54][56] However, there is always a chance that the humidity that condenses on the heat exchanger of the outdoor unit could freeze, even in models that have improved cold-weather performance, requiring a defrosting cycle to be performed.

The icing problem becomes much more severe with lower outdoor temperatures, so heat pumps are sometimes installed in tandem with a more conventional form of heating, such as an electrical heater, a natural gas, heating oil, or wood-burning fireplace or central heating, which is used instead of or in addition to the heat pump during harsher winter temperatures. In this case, the heat pump is used efficiently during milder temperatures, and the system is switched to the conventional heat source when the outdoor temperature is lower.

Performance

[edit]

Main articles: coefficient of performance, Seasonal energy efficiency ratio, and European seasonal energy efficiency ratio

The coefficient of performance (COP) of an air conditioning system is a ratio of useful heating or cooling provided to the work required.^[57][58] Higher COPs equate to lower operating costs. The COP usually exceeds 1; however, the exact value is highly dependent on operating conditions, especially absolute temperature and relative temperature between sink and system, and is often graphed or averaged against expected conditions.^[59] Air conditioner equipment power in the U.S. is often described in terms of "tons of refrigeration", with each approximately equal to the cooling power of one short ton (2,000 pounds (910 kg) of ice melting in a 24-hour period. The value is equal to 12,000 BTU_IT per hour, or 3,517 watts.^[60] Residential central air systems are usually from 1 to 5 tons (3.5 to 18 kW) in capacity.^{[citation needed]}

The efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER), which is defined by the Air Conditioning, Heating and Refrigeration Institute in its 2008 standard AHRI 210/240, Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment.^[61] A similar standard is the European seasonal energy efficiency ratio (ESEER).^{[citation needed]}

Efficiency is strongly affected by the humidity of the air to be cooled. Dehumidifying the air before attempting to cool it can reduce subsequent cooling costs by as much as 90 percent. Thus, reducing dehumidifying costs can materially affect overall air conditioning costs.^[62]

Control system

[edit]

Wireless remote control

[edit]

Main articles: Remote control and Infrared blaster

A wireless remote controller

The infrared transmitting LED on the remote

The infrared receiver on the air conditioner

This type of controller uses an infrared LED to relay commands from a remote control to the air conditioner. The output of the infrared LED (like that of any infrared remote) is invisible to the human eye because its wavelength is beyond the range of visible light (940 nm). This system is commonly used on mini-split air conditioners because it is simple and portable. Some window and ducted central air conditioners uses it as well.

Wired controller

[edit]

Main article: Thermostat

Several wired controllers (Indonesia, 2024)

A wired controller, also called a "wired thermostat," is a device that controls an air conditioner by switching heating or cooling on or off. It uses different sensors to measure temperatures and actuate control operations. Mechanical thermostats commonly use bimetallic strips, converting a temperature change into mechanical displacement, to actuate control of the air conditioner. Electronic thermostats, instead, use a thermistor or other semiconductor sensor, processing temperature change as electronic signals to control the air conditioner.

These controllers are usually used in hotel rooms because they are permanently installed into a wall and hard-wired directly into the air conditioner unit, eliminating the need for batteries.

Types

[edit]

Types	Typical Capacity*	Air supply	Mounting	Typical application
Mini-split	small – large	Direct	Wall	Residential
Window	very small – small	Direct	Window	Residential
Portable	very small – small	Direct / Ducted	Floor	Residential, remote areas
Ducted (individual)	small – very large	Ducted	Ceiling	Residential, commercial
Ducted (central)	medium – very large	Ducted	Ceiling	Residential, commercial
Ceiling suspended	medium – large	Direct	Ceiling	Commercial
Cassette	medium – large	Direct / Ducted	Ceiling	Commercial
Floor standing	medium – large	Direct / Ducted	Floor	Commercial
Packaged	very large	Direct / Ducted	Floor	Commercial
Packaged RTU (Rooftop Unit)	very large	Ducted	Rooftop	Commercial

* where the typical capacity is in kilowatt as follows:

• very small: <1.5 kW
• small: 1.5–3.5 kW
• medium: 4.2–7.1 kW
• large: 7.2–14 kW
• very large: >14 kW

Mini-split and multi-split systems

[edit]

Ductless systems (often mini-split, though there are now ducted mini-split) typically supply conditioned and heated air to a single or a few rooms of a building, without ducts and in a decentralized manner.^[63] Multi-zone or multi-split systems are a common application of ductless systems and allow up to eight rooms (zones or locations) to be conditioned independently from each other, each with its indoor unit and simultaneously from a single outdoor unit.

The first mini-split system was sold in 1961 by Toshiba in Japan, and the first wall-mounted mini-split air conditioner was sold in 1968 in Japan by Mitsubishi Electric, where small home sizes motivated their development. The Mitsubishi model was the first air conditioner with a cross-flow fan.^[64][65][66] In 1969, the first mini-split air conditioner was sold in the US.^[67] Multi-zone ductless systems were invented by Daikin in 1973, and variable refrigerant flow systems (which can be thought of as larger multi-split systems) were also invented by Daikin in 1982. Both were first sold in Japan.^[68] Variable refrigerant flow systems when compared with central plant cooling from an air handler, eliminate the need for large cool air ducts, air handlers, and chillers; instead cool refrigerant is transported through much smaller pipes to the indoor units in the spaces to be conditioned, thus allowing for less space above dropped ceilings and a lower structural impact, while also allowing for more individual and independent temperature control of spaces. The outdoor and indoor units can be spread across the building.^[69] Variable refrigerant flow indoor units can also be turned off individually in unused spaces.^{[citation needed]} The lower start-up power of VRF's DC inverter compressors and their inherent DC power requirements also allow VRF solar-powered heat pumps to be run using DC-providing solar panels.

Ducted central systems

[edit]

Split-system central air conditioners consist of two heat exchangers, an outside unit (the condenser) from which heat is rejected to the environment and an internal heat exchanger (the evaporator, or Fan Coil Unit, FCU) with the piped refrigerant being circulated between the two. The FCU is then connected to the spaces to be cooled by ventilation ducts.^[70] Floor standing air conditioners are similar to this type of air conditioner but sit within spaces that need cooling.

Central plant cooling

[edit]

See also: Chiller

Large central cooling plants may use intermediate coolant such as chilled water pumped into air handlers or fan coil units near or in the spaces to be cooled which then duct or deliver cold air into the spaces to be conditioned, rather than ducting cold air directly to these spaces from the plant, which is not done due to the low density and heat capacity of air, which would require impractically large ducts. The chilled water is cooled by chillers in the plant, which uses a refrigeration cycle to cool water, often transferring its heat to the atmosphere even in liquid-cooled chillers through the use of cooling towers. Chillers may be air- or liquid-cooled.^[71][72]

Portable units

[edit]

A portable system has an indoor unit on wheels connected to an outdoor unit via flexible pipes, similar to a permanently fixed installed unit (such as a ductless split air conditioner).

Hose systems, which can be monoblock or air-to-air, are vented to the outside via air ducts. The monoblock type collects the water in a bucket or tray and stops when full. The air-to-air type re-evaporates the water, discharges it through the ducted hose, and can run continuously. Many but not all portable units draw indoor air and expel it outdoors through a single duct, negatively impacting their overall cooling efficiency.

Many portable air conditioners come with heat as well as a dehumidification function.^[73]

Window unit and packaged terminal

[edit]

Main article: Packaged terminal air conditioner

The packaged terminal air conditioner (PTAC), through-the-wall, and window air conditioners are similar. These units are installed on a window frame or on a wall opening. The unit usually has an internal partition separating its indoor and outdoor sides, which contain the unit's condenser and evaporator, respectively. PTAC systems may be adapted to provide heating in cold weather, either directly by using an electric strip, gas, or other heaters, or by reversing the refrigerant flow to heat the interior and draw heat from the exterior air, converting the air conditioner into a heat pump. They may be installed in a wall opening with the help of a special sleeve on the wall and a custom grill that is flush with the wall and window air conditioners can also be installed in a window, but without a custom grill.^[74]

Packaged air conditioner

[edit]

Packaged air conditioners (also known as self-contained units)^[75][76] are central systems that integrate into a single housing all the components of a split central system, and deliver air, possibly through ducts, to the spaces to be cooled. Depending on their construction they may be outdoors or indoors, on roofs (rooftop units),^[77][78] draw the air to be conditioned from inside or outside a building and be water or air-cooled. Often, outdoor units are air-cooled while indoor units are liquid-cooled using a cooling tower.^{[70][79][80][81][82][83]}

Types of compressors

[edit]

Compressor types	Common applications	Typical capacity	Efficiency	Durability	Repairability
Reciprocating	Refrigerator, Walk-in freezer, portable air conditioners	small – large	very low (small capacity) medium (large capacity)	very low	medium
Rotary vane	Residential mini splits	small	low	low	easy
Scroll	Commercial and central systems, VRF	medium	medium	medium	easy
Rotary screw	Commercial chiller	medium – large	medium	medium	hard
Centrifugal	Commercial chiller	very large	medium	high	hard
Maglev Centrifugal	Commercial chiller	very large	high	very high	very hard

Reciprocating

[edit]

Main article: Reciprocating compressor

This compressor consists of a crankcase, crankshaft, piston rod, piston, piston ring, cylinder head and valves. ^{[citation needed]}

Scroll

[edit]

Main article: Scroll compressor

This compressor uses two interleaving scrolls to compress the refrigerant.^[84] it consists of one fixed and one orbiting scrolls. This type of compressor is more efficient because it has 70 percent less moving parts than a reciprocating compressor. ^{[citation needed]}

Screw

[edit]

Main article: Rotary-screw compressor

This compressor use two very closely meshing spiral rotors to compress the gas. The gas enters at the suction side and moves through the threads as the screws rotate. The meshing rotors force the gas through the compressor, and the gas exits at the end of the screws. The working area is the inter-lobe volume between the male and female rotors. It is larger at the intake end, and decreases along the length of the rotors until the exhaust port. This change in volume is the compression. ^{[citation needed]}

Capacity modulation technologies

[edit]

There are several ways to modulate the cooling capacity in refrigeration or air conditioning and heating systems. The most common in air conditioning are: on-off cycling, hot gas bypass, use or not of liquid injection, manifold configurations of multiple compressors, mechanical modulation (also called digital), and inverter technology. ^{[citation needed]}

Hot gas bypass

[edit]

Hot gas bypass involves injecting a quantity of gas from discharge to the suction side. The compressor will keep operating at the same speed, but due to the bypass, the refrigerant mass flow circulating with the system is reduced, and thus the cooling capacity. This naturally causes the compressor to run uselessly during the periods when the bypass is operating. The turn down capacity varies between 0 and 100%.^[85]

Manifold configurations

[edit]

Several compressors can be installed in the system to provide the peak cooling capacity. Each compressor can run or not in order to stage the cooling capacity of the unit. The turn down capacity is either 0/33/66 or 100% for a trio configuration and either 0/50 or 100% for a tandem.^{[citation needed]}

Mechanically modulated compressor

[edit]

This internal mechanical capacity modulation is based on periodic compression process with a control valve, the two scroll set move apart stopping the compression for a given time period. This method varies refrigerant flow by changing the average time of compression, but not the actual speed of the motor. Despite an excellent turndown ratio – from 10 to 100% of the cooling capacity, mechanically modulated scrolls have high energy consumption as the motor continuously runs.^{[citation needed]}

Variable-speed compressor

[edit]

Main article: Inverter compressor

This system uses a variable-frequency drive (also called an Inverter) to control the speed of the compressor. The refrigerant flow rate is changed by the change in the speed of the compressor. The turn down ratio depends on the system configuration and manufacturer. It modulates from 15 or 25% up to 100% at full capacity with a single inverter from 12 to 100% with a hybrid tandem. This method is the most efficient way to modulate an air conditioner's capacity. It is up to 58% more efficient than a fixed speed system.^{[citation needed]}

Impact

[edit]

Health effects

[edit]

In hot weather, air conditioning can prevent heat stroke, dehydration due to excessive sweating, electrolyte imbalance, kidney failure, and other issues due to hyperthermia.^[8][86] Heat waves are the most lethal type of weather phenomenon in the United States.^[87][88] A 2020 study found that areas with lower use of air conditioning correlated with higher rates of heat-related mortality and hospitalizations.^[89] The August 2003 France heatwave resulted in approximately 15,000 deaths, where 80% of the victims were over 75 years old. In response, the French government required all retirement homes to have at least one air-conditioned room at 25 °C (77 °F) per floor during heatwaves.^[8]

Air conditioning (including filtration, humidification, cooling and disinfection) can be used to provide a clean, safe, hypoallergenic atmosphere in hospital operating rooms and other environments where proper atmosphere is critical to patient safety and well-being. It is sometimes recommended for home use by people with allergies, especially mold.^[90][91] However, poorly maintained water cooling towers can promote the growth and spread of microorganisms such as Legionella pneumophila, the infectious agent responsible for Legionnaires' disease. As long as the cooling tower is kept clean (usually by means of a chlorine treatment), these health hazards can be avoided or reduced. The state of New York has codified requirements for registration, maintenance, and testing of cooling towers to protect against Legionella.^[92]

Economic effects

[edit]

First designed to benefit targeted industries such as the press as well as large factories, the invention quickly spread to public agencies and administrations with studies with claims of increased productivity close to 24% in places equipped with air conditioning.^[93]

Air conditioning caused various shifts in demography, notably that of the United States starting from the 1970s. In the US, the birth rate was lower in the spring than during other seasons until the 1970s but this difference then declined since then.^[94] As of 2007, the Sun Belt contained 30% of the total US population while it was inhabited by 24% of Americans at the beginning of the 20th century.^[95] Moreover, the summer mortality rate in the US, which had been higher in regions subject to a heat wave during the summer, also evened out.^[7]

The spread of the use of air conditioning acts as a main driver for the growth of global demand of electricity.^[96] According to a 2018 report from the International Energy Agency (IEA), it was revealed that the energy consumption for cooling in the United States, involving 328 million Americans, surpasses the combined energy consumption of 4.4 billion people in Africa, Latin America, the Middle East, and Asia (excluding China).^[8] A 2020 survey found that an estimated 88% of all US households use AC, increasing to 93% when solely looking at homes built between 2010 and 2020.^[97]

Environmental effects

[edit]

Space cooling including air conditioning accounted globally for 2021 terawatt-hours of energy usage in 2016 with around 99% in the form of electricity, according to a 2018 report on air-conditioning efficiency by the International Energy Agency.^[8] The report predicts an increase of electricity usage due to space cooling to around 6200 TWh by 2050,^[8][98] and that with the progress currently seen, greenhouse gas emissions attributable to space cooling will double: 1,135 million tons (2016) to 2,070 million tons.^[8] There is some push to increase the energy efficiency of air conditioners. United Nations Environment Programme (UNEP) and the IEA found that if air conditioners could be twice as effective as now, 460 billion tons of GHG could be cut over 40 years.^[99] The UNEP and IEA also recommended legislation to decrease the use of hydrofluorocarbons, better building insulation, and more sustainable temperature-controlled food supply chains going forward.^[99]

Refrigerants have also caused and continue to cause serious environmental issues, including ozone depletion and climate change, as several countries have not yet ratified the Kigali Amendment to reduce the consumption and production of hydrofluorocarbons.^[100] CFCs and HCFCs refrigerants such as R-12 and R-22, respectively, used within air conditioners have caused damage to the ozone layer,^[101] and hydrofluorocarbon refrigerants such as R-410A and R-404A, which were designed to replace CFCs and HCFCs, are instead exacerbating climate change.^[102] Both issues happen due to the venting of refrigerant to the atmosphere, such as during repairs. HFO refrigerants, used in some if not most new equipment, solve both issues with an ozone damage potential (ODP) of zero and a much lower global warming potential (GWP) in the single or double digits vs. the three or four digits of hydrofluorocarbons.^[103]

Hydrofluorocarbons would have raised global temperatures by around 0.3–0.5 °C (0.5–0.9 °F) by 2100 without the Kigali Amendment. With the Kigali Amendment, the increase of global temperatures by 2100 due to hydrofluorocarbons is predicted to be around 0.06 °C (0.1 °F).^[104]

Alternatives to continual air conditioning include passive cooling, passive solar cooling, natural ventilation, operating shades to reduce solar gain, using trees, architectural shades, windows (and using window coatings) to reduce solar gain.^{[citation needed]}

Social effects

[edit]

Socioeconomic groups with a household income below around $10,000 tend to have a low air conditioning adoption,^[42] which worsens heat-related mortality.^[7] The lack of cooling can be hazardous, as areas with lower use of air conditioning correlate with higher rates of heat-related mortality and hospitalizations.^[89] Premature mortality in NYC is projected to grow between 47% and 95% in 30 years, with lower-income and vulnerable populations most at risk.^[89] Studies on the correlation between heat-related mortality and hospitalizations and living in low socioeconomic locations can be traced in Phoenix, Arizona,^[105] Hong Kong,^[106] China,^[106] Japan,^[107] and Italy.^[108][109] Additionally, costs concerning health care can act as another barrier, as the lack of private health insurance during a 2009 heat wave in Australia, was associated with heat-related hospitalization.^[109]

Disparities in socioeconomic status and access to air conditioning are connected by some to institutionalized racism, which leads to the association of specific marginalized communities with lower economic status, poorer health, residing in hotter neighborhoods, engaging in physically demanding labor, and experiencing limited access to cooling technologies such as air conditioning.^[109] A study overlooking Chicago, Illinois, Detroit, and Michigan found that black households were half as likely to have central air conditioning units when compared to their white counterparts.^[110] Especially in cities, Redlining creates heat islands, increasing temperatures in certain parts of the city.^[109] This is due to materials heat-absorbing building materials and pavements and lack of vegetation and shade coverage.^[111] There have been initiatives that provide cooling solutions to low-income communities, such as public cooling spaces.^[8][111]

Other techniques

[edit]

Buildings designed with passive air conditioning are generally less expensive to construct and maintain than buildings with conventional HVAC systems with lower energy demands.^[112] While tens of air changes per hour, and cooling of tens of degrees, can be achieved with passive methods, site-specific microclimate must be taken into account, complicating building design.^[12]

Many techniques can be used to increase comfort and reduce the temperature in buildings. These include evaporative cooling, selective shading, wind, thermal convection, and heat storage.^[113]

Passive ventilation

[edit]

This section is an excerpt from Passive ventilation.[edit]

Passive ventilation is the process of supplying air to and removing air from an indoor space without using mechanical systems. It refers to the flow of external air to an indoor space as a result of pressure differences arising from natural forces.

There are two types of natural ventilation occurring in buildings: wind driven ventilation and buoyancy-driven ventilation. Wind driven ventilation arises from the different pressures created by wind around a building or structure, and openings being formed on the perimeter which then permit flow through the building. Buoyancy-driven ventilation occurs as a result of the directional buoyancy force that results from temperature differences between the interior and exterior.^[114]

Since the internal heat gains which create temperature differences between the interior and exterior are created by natural processes, including the heat from people, and wind effects are variable, naturally ventilated buildings are sometimes called "breathing buildings".

Passive cooling

[edit]

This section is an excerpt from Passive cooling.[edit]

Passive cooling is a building design approach that focuses on heat gain control and heat dissipation in a building in order to improve the indoor thermal comfort with low or no energy consumption.^[115][116] This approach works either by preventing heat from entering the interior (heat gain prevention) or by removing heat from the building (natural cooling).^[117]

Natural cooling utilizes on-site energy, available from the natural environment, combined with the architectural design of building components (e.g. building envelope), rather than mechanical systems to dissipate heat.^[118] Therefore, natural cooling depends not only on the architectural design of the building but on how the site's natural resources are used as heat sinks (i.e. everything that absorbs or dissipates heat). Examples of on-site heat sinks are the upper atmosphere (night sky), the outdoor air (wind), and the earth/soil.

Passive cooling is an important tool for design of buildings for climate change adaptation – reducing dependency on energy-intensive air conditioning in warming environments.^[119][120]

Daytime radiative cooling

[edit]

Passive daytime radiative cooling (PDRC) surfaces reflect incoming solar radiation and heat back into outer space through the infrared window for cooling during the daytime. Daytime radiative cooling became possible with the ability to suppress solar heating using photonic structures, which emerged through a study by Raman et al. (2014).^[122] PDRCs can come in a variety of forms, including paint coatings and films, that are designed to be high in solar reflectance and thermal emittance.^[121][123]

PDRC applications on building roofs and envelopes have demonstrated significant decreases in energy consumption and costs.^[123] In suburban single-family residential areas, PDRC application on roofs can potentially lower energy costs by 26% to 46%.^[124] PDRCs are predicted to show a market size of ~$27 billion for indoor space cooling by 2025 and have undergone a surge in research and development since the 2010s.^[125][126]

Fans

[edit]

Main article: Ceiling fan

Hand fans have existed since prehistory. Large human-powered fans built into buildings include the punkah.

The 2nd-century Chinese inventor Ding Huan of the Han dynasty invented a rotary fan for air conditioning, with seven wheels 3 m (10 ft) in diameter and manually powered by prisoners.^{[127]: 99, 151, 233} In 747, Emperor Xuanzong (r. 712–762) of the Tang dynasty (618–907) had the Cool Hall (Liang Dian 涼殿) built in the imperial palace, which the Tang Yulin describes as having water-powered fan wheels for air conditioning as well as rising jet streams of water from fountains. During the subsequent Song dynasty (960–1279), written sources mentioned the air conditioning rotary fan as even more widely used.^{[127]: 134, 151}

Thermal buffering

[edit]

In areas that are cold at night or in winter, heat storage is used. Heat may be stored in earth or masonry; air is drawn past the masonry to heat or cool it.^[13]

In areas that are below freezing at night in winter, snow and ice can be collected and stored in ice houses for later use in cooling.^[13] This technique is over 3,700 years old in the Middle East.^[128] Harvesting outdoor ice during winter and transporting and storing for use in summer was practiced by wealthy Europeans in the early 1600s,^[15] and became popular in Europe and the Americas towards the end of the 1600s.^[129] This practice was replaced by mechanical compression-cycle icemakers.

Evaporative cooling

[edit]

Main article: Evaporative cooler

In dry, hot climates, the evaporative cooling effect may be used by placing water at the air intake, such that the draft draws air over water and then into the house. For this reason, it is sometimes said that the fountain, in the architecture of hot, arid climates, is like the fireplace in the architecture of cold climates.^[11] Evaporative cooling also makes the air more humid, which can be beneficial in a dry desert climate.^[130]

Evaporative coolers tend to feel as if they are not working during times of high humidity, when there is not much dry air with which the coolers can work to make the air as cool as possible for dwelling occupants. Unlike other types of air conditioners, evaporative coolers rely on the outside air to be channeled through cooler pads that cool the air before it reaches the inside of a house through its air duct system; this cooled outside air must be allowed to push the warmer air within the house out through an exhaust opening such as an open door or window.^[131]

See also

[edit]

• Air filter
• Air purifier
• Cleanroom
• Crankcase heater
• Energy recovery ventilation
• Indoor air quality
• Particulates

References

[edit]

1. ^ "Air Con". Cambridge Dictionary. Archived from the original on May 3, 2022. Retrieved January 6, 2023.
2. ^ Dissertation Abstracts International: The humanities and social sciences. A. University Microfilms. 2005. p. 3600.
3. ^ 1993 ASHRAE Handbook: Fundamentals. ASHRAE. 1993. ISBN 978-0-910110-97-6.
4. ^ Enteria, Napoleon; Sawachi, Takao; Saito, Kiyoshi (January 31, 2023). Variable Refrigerant Flow Systems: Advances and Applications of VRF. Springer Nature. p. 46. ISBN 978-981-19-6833-4.
5. ^ Agencies, United States Congress House Committee on Appropriations Subcommittee on Dept of the Interior and Related (1988). Department of the Interior and Related Agencies Appropriations for 1989: Testimony of public witnesses, energy programs, Institute of Museum Services, National Endowment for the Arts, National Endowment for the Humanities. U.S. Government Printing Office. p. 629.
6. ^ "Earth Tubes: Providing the freshest possible air to your building". Earth Rangers Centre for Sustainable Technology Showcase. Archived from the original on January 28, 2021. Retrieved May 12, 2021.
7. ^ Jump up to:^{a b c} Barreca, Alan; Clay, Karen; Deschenes, Olivier; Greenstone, Michael; Shapiro, Joseph S. (February 2016). "Adapting to Climate Change: The Remarkable Decline in the US Temperature-Mortality Relationship over the Twentieth Century". Journal of Political Economy. 124 (1): 105–159. doi:10.1086/684582.
8. ^ Jump up to:^{a b c d e f g h i j} International Energy Agency (May 15, 2018). The Future of Cooling - Opportunities for energy-efficient air conditioning (PDF) (Report). Archived (PDF) from the original on June 26, 2024. Retrieved July 1, 2024.
9. ^ Laub, Julian M. (1963). Air Conditioning & Heating Practice. Holt, Rinehart and Winston. p. 367. ISBN 978-0-03-011225-6.
10. ^ "Air-conditioning found at 'oldest city in the world'". The Independent. June 24, 2000. Archived from the original on December 8, 2023. Retrieved December 9, 2023.
11. ^ Jump up to:^{a b c} Mohamed, Mady A.A. (January 2010). Lehmann, S.; Waer, H.A.; Al-Qawasmi, J. (eds.). Traditional Ways of Dealing with Climate in Egypt. The Seventh International Conference of Sustainable Architecture and Urban Development (SAUD 2010). Amman, Jordan: The Center for the Study of Architecture in Arab Region (CSAAR Press). pp. 247–266. Archived from the original on May 13, 2021. Retrieved May 12, 2021.
12. ^ Jump up to:^{a b c} Ford, Brian (September 2001). "Passive downdraught evaporative cooling: principles and practice". Architectural Research Quarterly. 5 (3): 271–280. doi:10.1017/S1359135501001312.
13. ^ Jump up to:^{a b c} Attia, Shady; Herde, André de (June 22–24, 2009). Designing the Malqaf for Summer Cooling in Low-Rise Housing, an Experimental Study. 26th Conference on Passive and Low Energy Architecture (PLEA2009). Quebec City. Archived from the original on May 13, 2021. Retrieved May 12, 2021 – via ResearchGate.
14. ^ "Heating, Ventilation and Air-Conditioning Systems, Part of Indoor Air Quality Design Tools for Schools". US EPA. October 17, 2014. Archived from the original on July 5, 2022. Retrieved July 5, 2022.
15. ^ Jump up to:^{a b c} Shachtman, Tom (1999). "Winter in Summer". Absolute zero and the conquest of cold. Boston: Houghton Mifflin Harcourt. ISBN 978-0395938881. OCLC 421754998. Archived from the original on May 13, 2021. Retrieved May 12, 2021.
16. ^ Porta, Giambattista Della (1584). Magiae naturalis (PDF). London. LCCN 09023451. Archived (PDF) from the original on May 13, 2021. Retrieved May 12, 2021. In our method I shall observe what our ancestors have said; then I shall show by my own experience, whether they be true or false
17. ^ Beck, Leonard D. (October 1974). "Things Magical in the collections of the Rare Book and Special Collections Division" (PDF). Library of Congress Quarterly Journal. 31: 208–234. Archived (PDF) from the original on March 24, 2021. Retrieved May 12, 2021.
18. ^ Laszlo, Pierre (2001). Salt: Grain of Life. Columbia University Press. p. 117. ISBN 978-0231121989. OCLC 785781471. Cornelius Drebbel air conditioning.
19. ^ Franklin, Benjamin (June 17, 1758). "The Montgomery Family: An historical and photographic perspective". Letter to John Lining. Archived from the original on February 25, 2021. Retrieved May 12, 2021.
20. ^ Jump up to:^{a b c d} Green, Amanda (January 1, 2015). "The Cool History of the Air Conditioner". Popular Mechanics. Archived from the original on April 10, 2021. Retrieved May 12, 2021.
21. ^ "John Gorrie". Encyclopædia Britannica. September 29, 2020. Archived from the original on March 13, 2021. Retrieved May 12, 2021.
22. ^ Gorrie, John "Improved process for the artificial production of ice" U.S. Patent no. 8080 (Issued: May 6, 1851).
23. ^ Wright, E. Lynne (2009). It Happened in Florida: Remarkable Events That Shaped History. Rowman & Littlefield. pp. 13–. ISBN 978-0762761692.
24. ^ Jump up to:^{a b} Bruce-Wallace, L. G. (1966). "Harrison, James (1816–1893)". Australian Dictionary of Biography. Vol. 1. Canberra: National Centre of Biography, Australian National University. ISBN 978-0-522-84459-7. ISSN 1833-7538. OCLC 70677943. Retrieved May 12, 2021.
25. ^ Palermo, Elizabeth (May 1, 2014). "Who Invented Air Conditioning?". livescience.com. Archived from the original on January 16, 2021. Retrieved May 12, 2021.
26. ^ Varrasi, John (June 6, 2011). "Global Cooling: The History of Air Conditioning". American Society of Mechanical Engineers. Archived from the original on March 8, 2021. Retrieved May 12, 2021.
27. ^ Simha, R. V. (February 2012). "Willis H Carrier". Resonance. 17 (2): 117–138. doi:10.1007/s12045-012-0014-y. ISSN 0971-8044. S2CID 116582893.
28. ^ Gulledge III, Charles; Knight, Dennis (February 11, 2016). "Heating, Ventilating, Air-Conditioning, And Refrigerating Engineering". National Institute of Building Sciences. Archived from the original on April 20, 2021. Retrieved May 12, 2021. Though he did not actually invent air-conditioning nor did he take the first documented scientific approach to applying it, Willis Carrier is credited with integrating the scientific method, engineering, and business of this developing technology and creating the industry we know today as air-conditioning.
29. ^ "Willis Carrier – 1876–1902". Carrier Global. Archived from the original on February 27, 2021. Retrieved May 12, 2021.
30. ^ "Carrier Reports First Quarter 2020 Earnings". Carrier Global (Press release). May 8, 2020. Archived from the original on January 24, 2021. Retrieved May 12, 2021.
31. ^ "Carrier Becomes Independent, Publicly Traded Company, Begins Trading on New York Stock Exchange". Carrier Global (Press release). April 3, 2020. Archived from the original on February 25, 2021. Retrieved May 12, 2021.
32. ^ Cramer, Stuart W. "Humidifying and air conditioning apparatus" U.S. Patent no. 852,823 (filed: April 18, 1906; issued: May 7, 1907).
    • See also: Cramer, Stuart W. (1906) "Recent development in air conditioning" in: Proceedings of the Tenth Annual Convention of the American Cotton Manufacturers Association Held at Asheville, North Carolina May 16–17, 1906. Charlotte, North Carolina, USA: Queen City Publishing Co. pp. 182-211.
33. ^ US patent US808897A, Carrier, Willis H., "Apparatus for treating air", published January 2, 1906, issued January 2, 1906 and Buffalo Forge Company"No. 808,897 Patented Jan. 2, 1906: H. W. Carrier: Apparatus for Treating Air" (PDF). Archived (PDF) from the original on December 5, 2019. Retrieved May 12, 2021.
34. ^ "First Air-Conditioned Auto". Popular Science. Vol. 123, no. 5. November 1933. p. 30. ISSN 0161-7370. Archived from the original on April 26, 2021. Retrieved May 12, 2021.
35. ^ "Room-size air conditioner fits under window sill". Popular Mechanics. Vol. 63, no. 6. June 1935. p. 885. ISSN 0032-4558. Archived from the original on November 22, 2016. Retrieved May 12, 2021.
36. ^ "Michigan Fast Facts and Trivia". 50states.com. Archived from the original on June 18, 2017. Retrieved May 12, 2021.
37. ^ US patent US2433960A, Sherman, Robert S., "Air conditioning apparatus", published January 6, 1948, issued January 6, 1948
38. ^ "IEEE milestones (39) Inverter Air Conditioners, 1980–1981" (PDF). March 2021. Archived (PDF) from the original on January 21, 2024. Retrieved February 9, 2024.
39. ^ "Inverter Air Conditioners, 1980–1981 IEEE Milestone Celebration Ceremony" (PDF). March 16, 2021. Archived (PDF) from the original on January 21, 2024. Retrieved February 9, 2024.
40. ^ Seale, Avrel (August 7, 2023). "Texas alumnus and his alma mater central to air-conditioned homes". UT News. Retrieved November 13, 2024.
41. ^ "Air Conditioned Village". Atlas Obscura. Retrieved November 13, 2024.
42. ^ Jump up to:^{a b c} Davis, Lucas; Gertler, Paul; Jarvis, Stephen; Wolfram, Catherine (July 2021). "Air conditioning and global inequality". Global Environmental Change. 69: 102299. Bibcode:2021GEC....6902299D. doi:10.1016/j.gloenvcha.2021.102299.
43. ^ Pierre-Louis, Kendra (May 15, 2018). "The World Wants Air-Conditioning. That Could Warm the World". The New York Times. Archived from the original on February 16, 2021. Retrieved May 12, 2021.
44. ^ Carroll, Rory (October 26, 2015). "How America became addicted to air conditioning". The Guardian. Los Angeles. Archived from the original on March 13, 2021. Retrieved May 12, 2021.
45. ^ Lester, Paul (July 20, 2015). "History of Air Conditioning". United States Department of Energy. Archived from the original on June 5, 2020. Retrieved May 12, 2021.
46. ^ Cornish, Cheryl; Cooper, Stephen; Jenkins, Salima. Characteristics of New Housing (Report). United States Census Bureau. Archived from the original on April 11, 2021. Retrieved May 12, 2021.
47. ^ "Central Air Conditioning Buying Guide". Consumer Reports. March 3, 2021. Archived from the original on May 9, 2021. Retrieved May 12, 2021.
48. ^ Petchers, Neil (2003). Combined Heating, Cooling & Power Handbook: Technologies & Applications : an Integrated Approach to Energy Resource Optimization. The Fairmont Press. p. 737. ISBN 978-0-88173-433-1.
49. ^ Krarti, Moncef (December 1, 2020). Energy Audit of Building Systems: An Engineering Approach, Third Edition. CRC Press. p. 370. ISBN 978-1-000-25967-4.
50. ^ "What is a Reversing Valve". Samsung India. Archived from the original on February 22, 2019. Retrieved May 12, 2021.
51. ^ "Humidity and Comfort" (PDF). DriSteem. Archived from the original (PDF) on May 16, 2018. Retrieved May 12, 2021.
52. ^ Perryman, Oliver (April 19, 2021). "Dehumidifier vs Air Conditioning". Dehumidifier Critic. Archived from the original on May 13, 2021. Retrieved May 12, 2021.
53. ^ Snijders, Aart L. (July 30, 2008). "Aquifer Thermal Energy Storage (ATES) Technology Development and Major Applications in Europe" (PDF). Toronto and Region Conservation Authority. Arnhem: IFTech International. Archived (PDF) from the original on March 8, 2021. Retrieved May 12, 2021.
54. ^ Jump up to:^{a b} "Cold Climate Air Source Heat Pump" (PDF). Minnesota Department of Commerce, Division of Energy Resources. Archived (PDF) from the original on January 2, 2022. Retrieved March 29, 2022.
55. ^ "Even in Frigid Temperatures, Air-Source Heat Pumps Keep Homes Warm From Alaska Coast to U.S. Mass Market". nrel.gov. Archived from the original on April 10, 2022. Retrieved March 29, 2022.
56. ^ "Heat Pumps: A Practical Solution for Cold Climates". RMI. December 10, 2020. Archived from the original on March 31, 2022. Retrieved March 28, 2022.
57. ^ "TEM Instruction Sheet" (PDF). TE Technology. March 14, 2012. Archived from the original (PDF) on January 24, 2013. Retrieved May 12, 2021.
58. ^ "Coefficient of Performance (COP) heat pumps". Grundfos. November 18, 2020. Archived from the original on May 3, 2021. Retrieved May 12, 2021.
59. ^ "Unpotted HP-199-1.4-0.8 at a hot-side temperature of 25 °C" (PDF). TE Technology. Archived from the original (PDF) on January 7, 2009. Retrieved February 9, 2024.
60. ^ Newell, David B.; Tiesinga, Eite, eds. (August 2019). The International System of Units (SI) (PDF). National Institute of Standards and Technology. doi:10.6028/NIST.SP.330-2019. Archived (PDF) from the original on April 22, 2021. Retrieved May 13, 2021.
61. ^ ANSI/AHRI 210/240-2008: 2008 Standard for Performance Rating of Unitary Air-Conditioning & Air-Source Heat Pump Equipment (PDF). Air Conditioning, Heating and Refrigeration Institute. 2012. Archived from the original on March 29, 2018. Retrieved May 13, 2021.
62. ^ Baraniuk, Chris. "Cutting-Edge Technology Could Massively Reduce the Amount of Energy Used for Air Conditioning". Wired. ISSN 1059-1028. Retrieved July 18, 2024.
63. ^ "M-Series Contractor Guide" (PDF). Mitsubishipro.com. p. 19. Archived (PDF) from the original on March 18, 2021. Retrieved May 12, 2021.
64. ^ "エアコンの歴史とヒミツ | 調べよう家電と省エネ | キッズ版 省エネ家電 de スマートライフ（一般財団法人 家電製品協会） 学ぼう！スマートライフ". shouene-kaden.net. Archived from the original on September 7, 2022. Retrieved January 21, 2024.
65. ^ "Air conditioner | History". Toshiba Carrier. April 2016. Archived from the original on March 9, 2021. Retrieved May 12, 2021.
66. ^ "1920s–1970s | History". Mitsubishi Electric. Archived from the original on March 8, 2021. Retrieved May 12, 2021.
67. ^ Wagner, Gerry (November 30, 2021). "The Duct Free Zone: History of the Mini Split". HPAC Magazine. Retrieved February 9, 2024.
68. ^ "History of Daikin Innovation". Daikin. Archived from the original on June 5, 2020. Retrieved May 12, 2021.
69. ^ Feit, Justin (December 20, 2017). "The Emergence of VRF as a Viable HVAC Option". buildings.com. Archived from the original on December 3, 2020. Retrieved May 12, 2021.
70. ^ Jump up to:^{a b} "Central Air Conditioning". United States Department of Energy. Archived from the original on January 30, 2021. Retrieved May 12, 2021.
71. ^ Kreith, Frank; Wang, Shan K.; Norton, Paul (April 20, 2018). Air Conditioning and Refrigeration Engineering. CRC Press. ISBN 978-1-351-46783-4.
72. ^ Wang, Shan K. (November 7, 2000). Handbook of Air Conditioning and Refrigeration. McGraw-Hill Education. ISBN 978-0-07-068167-5.
73. ^ Hleborodova, Veronika (August 14, 2018). "Portable Vs Split System Air Conditioning | Pros & Cons". Canstar Blue. Archived from the original on March 9, 2021. Retrieved May 12, 2021.
74. ^ Kamins, Toni L. (July 15, 2013). "Through-the-Wall Versus PTAC Air Conditioners: A Guide for New Yorkers". Brick Underground. Archived from the original on January 15, 2021. Retrieved May 12, 2021.
75. ^ "Self-Contained Air Conditioning Systems". Daikin Applied Americas. 2015. Archived from the original on October 30, 2020. Retrieved May 12, 2021.
76. ^ "LSWU/LSWD Vertical Water-Cooled Self-Contained Unit Engineering Guide" (PDF). Johnson Controls. April 6, 2018. Archived (PDF) from the original on May 13, 2021. Retrieved May 12, 2021.
77. ^ "Packaged Rooftop Unit" (PDF). Carrier Global. 2016. Archived (PDF) from the original on May 13, 2021. Retrieved May 12, 2021.
78. ^ "Packaged Rooftop Air Conditioners" (PDF). Trane Technologies. November 2006. Archived (PDF) from the original on May 13, 2021. Retrieved May 12, 2021.
79. ^ "What is Packaged Air Conditioner? Types of Packged Air Condtioners". Bright Hub Engineering. January 13, 2010. Archived from the original on February 22, 2018. Retrieved May 12, 2021.
80. ^ Evans, Paul (November 11, 2018). "RTU Rooftop Units explained". The Engineering Mindset. Archived from the original on January 15, 2021. Retrieved May 12, 2021.
81. ^ "water-cooled – Johnson Supply". studylib.net. 2000. Archived from the original on May 13, 2021. Retrieved May 12, 2021.
82. ^ "Water Cooled Packaged Air Conditioners" (PDF). Japan: Daikin. May 2, 2003. Archived (PDF) from the original on June 19, 2018. Retrieved May 12, 2021.
83. ^ "Water Cooled Packaged Unit" (PDF). Daikin. Archived (PDF) from the original on May 13, 2021. Retrieved May 12, 2021.
84. ^ Lun, Y. H. Venus; Tung, S. L. Dennis (November 13, 2019). Heat Pumps for Sustainable Heating and Cooling. Springer Nature. p. 25. ISBN 978-3-030-31387-6.
85. ^ Ghanbariannaeeni, Ali; Ghazanfarihashemi, Ghazalehsadat (June 2012). "Bypass Method For Recip Compressor Capacity Control". Pipeline and Gas Journal. 239 (6). Archived from the original on August 12, 2014. Retrieved February 9, 2024.
86. ^ "Heat Stroke (Hyperthermia)". Harvard Health. January 2, 2019. Archived from the original on January 29, 2021. Retrieved May 13, 2021.
87. ^ "Weather Related Fatality and Injury Statistics". National Weather Service. 2021. Archived from the original on August 24, 2022. Retrieved August 24, 2022.
88. ^ "Extreme Weather: A Guide to Surviving Flash Floods, Tornadoes, Hurricanes, Heat Waves, Snowstorms Tsunamis and Other Natural Disasters". Reference Reviews. 26 (8): 41. October 19, 2012. doi:10.1108/09504121211278322. ISSN 0950-4125. Archived from the original on January 21, 2024. Retrieved December 9, 2023.
89. ^ Jump up to:^{a b c} Gamarro, Harold; Ortiz, Luis; González, Jorge E. (August 1, 2020). "Adapting to Extreme Heat: Social, Atmospheric, and Infrastructure Impacts of Air-Conditioning in Megacities—The Case of New York City". Journal of Engineering for Sustainable Buildings and Cities. 1 (3). doi:10.1115/1.4048175. ISSN 2642-6641. S2CID 222121944.
90. ^ Spiegelman, Jay; Friedman, Herman; Blumstein, George I. (September 1, 1963). "The effects of central air conditioning on pollen, mold, and bacterial concentrations". Journal of Allergy. 34 (5): 426–431. doi:10.1016/0021-8707(63)90007-8. ISSN 0021-8707. PMID 14066385.
91. ^ Portnoy, Jay M.; Jara, David (February 1, 2015). "Mold allergy revisited". Annals of Allergy, Asthma & Immunology. 114 (2): 83–89. doi:10.1016/j.anai.2014.10.004. ISSN 1081-1206. PMID 25624128.
92. ^ "Subpart 4-1 – Cooling Towers". New York Codes, Rules and Regulations. June 7, 2016. Archived from the original on May 13, 2021. Retrieved May 13, 2021.
93. ^ Nordhaus, William D. (February 10, 2010). "Geography and macroeconomics: New data and new findings". Proceedings of the National Academy of Sciences. 103 (10): 3510–3517. doi:10.1073/pnas.0509842103. ISSN 0027-8424. PMC 1363683. PMID 16473945.
94. ^ Barreca, Alan; Deschenes, Olivier; Guldi, Melanie (2018). "Maybe next month? Temperature shocks and dynamic adjustments in birth rates". Demography. 55 (4): 1269–1293. doi:10.1007/s13524-018-0690-7. PMC 7457515. PMID 29968058.
95. ^ Glaeser, Edward L.; Tobio, Kristina (January 2008). "The Rise of the Sunbelt". Southern Economic Journal. 74 (3): 609–643. doi:10.1002/j.2325-8012.2008.tb00856.x.
96. ^ Sherman, Peter; Lin, Haiyang; McElroy, Michael (2018). "Projected global demand for air conditioning associated with extreme heat and implications for electricity grids in poorer countries". Energy and Buildings. 268: 112198. doi:10.1016/j.enbuild.2022.112198. ISSN 0378-7788. S2CID 248979815.
97. ^ Air Filters Used in Air Conditioning and General Ventilation Part 1: Methods of Test for Atmospheric Dust Spot Efficiency and Synthetic Dust Weight Arrestance (Withdrawn Standard). British Standards Institution. March 29, 1985. BS 6540-1:1985.
98. ^ Mutschler, Robin; Rüdisüli, Martin; Heer, Philipp; Eggimann, Sven (April 15, 2021). "Benchmarking cooling and heating energy demands considering climate change, population growth and cooling device uptake". Applied Energy. 288: 116636. Bibcode:2021ApEn..28816636M. doi:10.1016/j.apenergy.2021.116636. ISSN 0306-2619.
99. ^ Jump up to:^{a b} "Climate-friendly cooling could cut years of Greenhouse Gas Emissions and save US$ trillions: UN". Climate Change and Law Collection. doi:10.1163/9789004322714_cclc_2020-0252-0973.
100. ^ Gerretsen, Isabelle (December 8, 2020). "How your fridge is heating up the planet". BBC Future. Archived from the original on May 10, 2021. Retrieved May 13, 2021.
101. ^ Encyclopedia of Energy: Ph-S. Elsevier. 2004. ISBN 978-0121764821.
102. ^ Corberan, J.M. (2016). "New trends and developments in ground-source heat pumps". Advances in Ground-Source Heat Pump Systems. pp. 359–385. doi:10.1016/B978-0-08-100311-4.00013-3. ISBN 978-0-08-100311-4.
103. ^ Roselli, Carlo; Sasso, Maurizio (2021). Geothermal Energy Utilization and Technologies 2020. MDPI. ISBN 978-3036507040.
104. ^ "Cooling Emissions and Policy Synthesis Report: Benefits of cooling efficiency and the Kigali Amendment, United Nations Environment Programme - International Energy Agency, 2020" (PDF).
105. ^ Harlan, Sharon L.; Declet-Barreto, Juan H.; Stefanov, William L.; Petitti, Diana B. (February 2013). "Neighborhood Effects on Heat Deaths: Social and Environmental Predictors of Vulnerability in Maricopa County, Arizona". Environmental Health Perspectives. 121 (2): 197–204. Bibcode:2013EnvHP.121..197H. doi:10.1289/ehp.1104625. ISSN 0091-6765. PMC 3569676. PMID 23164621.
106. ^ Jump up to:^{a b} Chan, Emily Ying Yang; Goggins, William B; Kim, Jacqueline Jakyoung; Griffiths, Sian M (April 2012). "A study of intracity variation of temperature-related mortality and socioeconomic status among the Chinese population in Hong Kong". Journal of Epidemiology and Community Health. 66 (4): 322–327. doi:10.1136/jech.2008.085167. ISSN 0143-005X. PMC 3292716. PMID 20974839.
107. ^ Ng, Chris Fook Sheng; Ueda, Kayo; Takeuchi, Ayano; Nitta, Hiroshi; Konishi, Shoko; Bagrowicz, Rinako; Watanabe, Chiho; Takami, Akinori (2014). "Sociogeographic Variation in the Effects of Heat and Cold on Daily Mortality in Japan". Journal of Epidemiology. 24 (1): 15–24. doi:10.2188/jea.JE20130051. PMC 3872520. PMID 24317342.
108. ^ Stafoggia, Massimo; Forastiere, Francesco; Agostini, Daniele; Biggeri, Annibale; Bisanti, Luigi; Cadum, Ennio; Caranci, Nicola; de'Donato, Francesca; De Lisio, Sara; De Maria, Moreno; Michelozzi, Paola; Miglio, Rossella; Pandolfi, Paolo; Picciotto, Sally; Rognoni, Magda (2006). "Vulnerability to Heat-Related Mortality: A Multicity, Population-Based, Case-Crossover Analysis". Epidemiology. 17 (3): 315–323. doi:10.1097/01.ede.0000208477.36665.34. ISSN 1044-3983. JSTOR 20486220. PMID 16570026. S2CID 20283342.
109. ^ Jump up to:^{a b c d} Gronlund, Carina J. (September 2014). "Racial and Socioeconomic Disparities in Heat-Related Health Effects and Their Mechanisms: a Review". Current Epidemiology Reports. 1 (3): 165–173. doi:10.1007/s40471-014-0014-4. PMC 4264980. PMID 25512891.
110. ^ O'Neill, M. S. (May 11, 2005). "Disparities by Race in Heat-Related Mortality in Four US Cities: The Role of Air Conditioning Prevalence". Journal of Urban Health: Bulletin of the New York Academy of Medicine. 82 (2): 191–197. doi:10.1093/jurban/jti043. PMC 3456567. PMID 15888640.
111. ^ Jump up to:^{a b} Sampson, Natalie R.; Gronlund, Carina J.; Buxton, Miatta A.; Catalano, Linda; White-Newsome, Jalonne L.; Conlon, Kathryn C.; O’Neill, Marie S.; McCormick, Sabrina; Parker, Edith A. (April 1, 2013). "Staying cool in a changing climate: Reaching vulnerable populations during heat events". Global Environmental Change. 23 (2): 475–484. Bibcode:2013GEC....23..475S. doi:10.1016/j.gloenvcha.2012.12.011. ISSN 0959-3780. PMC 5784212. PMID 29375195.
112. ^ Niktash, Amirreza; Huynh, B. Phuoc (July 2–4, 2014). Simulation and Analysis of Ventilation Flow Through a Room Caused by a Two-sided Windcatcher Using a LES Method (PDF). World Congress on Engineering. Lecture Notes in Engineering and Computer Science. Vol. 2. London. eISSN 2078-0966. ISBN 978-9881925350. ISSN 2078-0958. Archived (PDF) from the original on April 26, 2018. Retrieved May 13, 2021.
113. ^ Zhang, Chen; Kazanci, Ongun Berk; Levinson, Ronnen; Heiselberg, Per; Olesen, Bjarne W.; Chiesa, Giacomo; Sodagar, Behzad; Ai, Zhengtao; Selkowitz, Stephen; Zinzi, Michele; Mahdavi, Ardeshir (November 15, 2021). "Resilient cooling strategies – A critical review and qualitative assessment". Energy and Buildings. 251: 111312. Bibcode:2021EneBu.25111312Z. doi:10.1016/j.enbuild.2021.111312. hdl:2117/363031. ISSN 0378-7788.
114. ^ Linden, P. F. (1999). "The Fluid Mechanics of Natural Ventilation". Annual Review of Fluid Mechanics. 31: 201–238. Bibcode:1999AnRFM..31..201L. doi:10.1146/annurev.fluid.31.1.201.
115. ^ Santamouris, M.; Asimakoupolos, D. (1996). Passive cooling of buildings (1st ed.). London: James & James (Science Publishers) Ltd. ISBN 978-1-873936-47-4.
116. ^ Leo Samuel, D.G.; Shiva Nagendra, S.M.; Maiya, M.P. (August 2013). "Passive alternatives to mechanical air conditioning of building: A review". Building and Environment. 66: 54–64. Bibcode:2013BuEnv..66...54S. doi:10.1016/j.buildenv.2013.04.016.
117. ^ M.j, Limb (January 1, 1998). "BIB 08: An Annotated Bibliography: Passive Cooling Technology for Office Buildings in Hot Dry and Temperate Climates".
118. ^ Niles, Philip; Kenneth, Haggard (1980). Passive Solar Handbook. California Energy Resources Conservation. ASIN B001UYRTMM.
119. ^ "Cooling: The hidden threat for climate change and sustainable goals". phys.org. Retrieved September 18, 2021.
120. ^ Ford, Brian (September 2001). "Passive downdraught evaporative cooling: principles and practice". Arq: Architectural Research Quarterly. 5 (3): 271–280. doi:10.1017/S1359135501001312. ISSN 1474-0516. S2CID 110209529.
121. ^ Jump up to:^{a b} Chen, Meijie; Pang, Dan; Chen, Xingyu; Yan, Hongjie; Yang, Yuan (2022). "Passive daytime radiative cooling: Fundamentals, material designs, and applications". EcoMat. 4. doi:10.1002/eom2.12153. S2CID 240331557. Passive daytime radiative cooling (PDRC) dissipates terrestrial heat to the extremely cold outer space without using any energy input or producing pollution. It has the potential to simultaneously alleviate the two major problems of energy crisis and global warming.
122. ^ Raman, Aaswath P.; Anoma, Marc Abou; Zhu, Linxiao; Rephaeli, Eden; Fan, Shanhui (November 2014). "Passive radiative cooling below ambient air temperature under direct sunlight". Nature. 515 (7528): 540–544. Bibcode:2014Natur.515..540R. doi:10.1038/nature13883. PMID 25428501.
123. ^ Jump up to:^{a b} Bijarniya, Jay Prakash; Sarkar, Jahar; Maiti, Pralay (November 2020). "Review on passive daytime radiative cooling: Fundamentals, recent researches, challenges and opportunities". Renewable and Sustainable Energy Reviews. 133: 110263. Bibcode:2020RSERv.13310263B. doi:10.1016/j.rser.2020.110263. S2CID 224874019.
124. ^ Mokhtari, Reza; Ulpiani, Giulia; Ghasempour, Roghayeh (July 2022). "The Cooling Station: Combining hydronic radiant cooling and daytime radiative cooling for urban shelters". Applied Thermal Engineering. 211: 118493. Bibcode:2022AppTE.21118493M. doi:10.1016/j.applthermaleng.2022.118493.
125. ^ Yang, Yuan; Zhang, Yifan (July 2020). "Passive daytime radiative cooling: Principle, application, and economic analysis". MRS Energy & Sustainability. 7 (1). doi:10.1557/mre.2020.18.
126. ^ Miranda, Nicole D.; Renaldi, Renaldi; Khosla, Radhika; McCulloch, Malcolm D. (October 2021). "Bibliometric analysis and landscape of actors in passive cooling research". Renewable and Sustainable Energy Reviews. 149: 111406. Bibcode:2021RSERv.14911406M. doi:10.1016/j.rser.2021.111406.
127. ^ Jump up to:^{a b} Needham, Joseph; Wang, Ling (1991). Science and Civilisation in China, Volume 4: Physics and Physical Technology, Part 2, Mechanical Engineering. Cambridge University Press. ISBN 978-0521058032. OCLC 468144152.
128. ^ Dalley, Stephanie (2002). Mari and Karana: Two Old Babylonian Cities (2nd ed.). Piscataway, New Jersey: Gorgias Press. p. 91. ISBN 978-1931956024. OCLC 961899663. Archived from the original on January 29, 2021. Retrieved May 13, 2021.
129. ^ Nagengast, Bernard (February 1999). "Comfort from a Block of Ice: A History of Comfort Cooling Using Ice" (PDF). ASHRAE Journal. 41 (2): 49. ISSN 0001-2491. Archived (PDF) from the original on May 13, 2021. Retrieved May 13, 2021.
130. ^ Bahadori, Mehdi N. (February 1978). "Passive Cooling Systems in Iranian Architecture". Scientific American. 238 (2): 144–154. Bibcode:1978SciAm.238b.144B. doi:10.1038/SCIENTIFICAMERICAN0278-144.
131. ^ Smith, Shane (2000). Greenhouse Gardener's Companion: Growing Food and Flowers in Your Greenhouse Or Sunspace. Illustrated by Marjorie C. Leggitt (illustrated, revised ed.). Golden, Colorado: Fulcrum Publishing. p. 62. ISBN 978-1555914509. OCLC 905564174. Archived from the original on May 13, 2021. Retrieved August 25, 2020.

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