Air Conditioning Service Near Me: Specialist Cooling System Restoration Can Enhance Your Home'S Comfort Quickly And Efficiently
Common Air Conditioning System Problems
Is your ac system unexpectedly sounding like a far-off thunderstorm? Or perhaps the cool breeze has turned into a faint whisper? These are traditional indications that your unit requires some serious air conditioning system repair work. Every summer season, many homeowners face issues that freeze their comfort and surge their frustration.
Here's a fast rundown of the most regular perpetrators behind an ailing air conditioning:
- Refrigerant Leaks-- When the coolant leaves, your air conditioner can't chill the air effectively.
- Dirty Filters-- A blocked filter strangles air flow, causing uneven cooling and greater energy costs.
- Frozen Coils-- Ever seen ice develop on your unit? This typically signals obstructed air flow or low refrigerant levels.
- Thermostat Malfunctions-- Often, the issue isn't the air conditioner however the brain managing it.
- Electrical Failures-- Faulty electrical wiring or worn elements can trigger unexpected shutdowns or irregular behavior.
Keep in mind the last scorching day when your AC quit? It's not simply irritating; it can turn your home into an oven. Envision a group stepping in rapidly, detecting the glitch with precision, and restoring your sanctuary's chill in no time. That's the kind of air conditioning unit repair service that changes headaches into relief.
Problem | Symptoms | How Bold City Heating and Air Helps |
---|---|---|
Refrigerant Leakage | Warm air, hissing sounds | Specialist leak detection and precise refilling |
Dirty Filters | Weak air flow, dirty vents | Thorough cleansing and replacement |
Frozen Coils | Ice accumulation, no cooling | System defrost and air flow optimization |
Could a flickering thermostat be the tricky perpetrator stealing your comfort? Or maybe an unseen electrical fault quietly undermining your system? Bold City Heating and Air takes on these challenges head-on, guaranteeing your a/c hums smoothly and effectively. - Bold City Heating and Air
Why settle for unforeseeable cooling when a professional touch can bring consistent, rejuvenating air back into your life? The science of air conditioning system repair work isn't practically fixing makers-- it's about bring back assurance on the hottest days of the year.
Necessary Tools for Detecting and Fixing Air Conditioners
When an a/c system sputters or unexpectedly stops cooling, the first impulse might be to panic. The genuine secret lies in the precision instruments an expert wields to diagnose the source swiftly. Ever question why some specialists seem to repair complex issues in a snap? It's all about having the right tools-- from the humble to the extremely specialized
Secret Instruments in the AC Repair Work Toolbox
- Manifold Gauge Set: Believe of this as the technician's stethoscope. It measures pressure in the refrigerant lines, exposing leaks or clogs that invisible to the naked eye.
- Multimeter: Electricity flows are difficult; this tool reads voltage, existing, and resistance, ensuring every electrical part is humming as it should.
- Drip Detector: Identifying even the tiniest refrigerant leakages can save a system from early failure. This tool seeks undetectable gas escaping from seals or coils.
- Fin Comb: Bent fins on the condenser coil can choke air flow. A basic fin comb straightens these blades, bring back effectiveness without changing parts.
- Vacuum Pump: Before charging refrigerant, the system frequently needs evacuation of air and moisture, an action critical for durability and performance.
Why Bold City Heating and Air Excels
Bold City Heating and Air comprehends the fragile dance in between these tools and the detailed equipment of your cooling system. They approach every repair work with a keen eye and a well-stocked tool kit. It's not just about repairing what's broken; it has to do with avoiding future missteps through specialist medical diagnosis and precision.
Pro Tips from the Field
- Always calibrate your manifold assesses before usage; a small error in pressure reading can result in misdiagnosis.
- Don't neglect the value of a clean workplace-- dust and debris can throw off sensitive electrical readings.
- When handling refrigerant, safety is critical. Usage gloves and safety glasses, and guarantee appropriate ventilation.
- Utilize a thermal imaging cam to find hotspots or cold spots in wiring and coils that may not show up otherwise.
Could there be a more remarkable mix of science and craft than the tools used in air conditioning repair? Each tool narrates, and with Bold City Heating and Air, that story is always among swift, effective options and restored convenience.
Dissecting the Heart of Your A/c
Ever wondered what actually happens when your ac system repair work kicks off? It's not simply about slapping on a brand-new filter or topping off refrigerant. The real art lies in a methodical, meticulous step-by-step repair work process that Bold City Heating and Air has mastered. They comprehend that each system narrates-- often a whisper of a defective capacitor, other times a shout from a clogged up condenser coil.
Action 1: Diagnostic Deep Dive
The process begins with a comprehensive diagnostic that digs underneath surface symptoms. Is the system blowing warm air? Exists an uncommon sound, like a ghost in the device? Strong City specialists utilize advanced tools to measure electrical currents, refrigerant levels, and air flow patterns. This isn't guesswork-- it's accuracy.
Step 2: Identifying the Source
Once the diagnostic puzzle is complete, the true culprit emerges (Bold City Heating and Air). Could it be a compressor resisting low refrigerant? Or a thermostat that's lost its marbles? Bold City Heating and Air stands out in recognizing the precise component causing the hiccup, preventing unneeded part replacements
Action 3: Tactical Repair Work Execution
- Power down the system safely to avoid any shocks or damage.
- Get rid of and examine the defective component-- whether it's a fan motor, capacitor, or evaporator coil.
- Perform exact repairs or replacements utilizing OEM-equivalent parts.
- Reassemble the unit ensuring all connections are tight and sealed.
Step 4: Rigorous Efficiency Testing
After repairs, the unit goes through a battery of tests. Bold City Heating and Air doesn't simply change it on; they determine temperature level differentials and air flow rates to confirm optimal energy efficiency. This step warranties your system won't just run-- it'll slide through the blistering days like a breeze.
Pro Tips from the Trenches
- Check the condenser coil regularly-- dust and particles can turn a cool machine into a sweatbox.
- Listen for humming or clicking noises. These subtle signals typically precede larger failures.
- Watch on your unit's cycle duration; uncommonly brief or long cycles might hint at underlying problems.
Spotting the Quiet Stress: Why Preventive Upkeep Matters
Ever observed how an air conditioning system can unexpectedly sputter and sigh, as if gasping for breath in the thick summer heat? The fact is, a blocked air filter or an ignored coil can silently stealth their way into your system, leading to inefficient cooling and unforeseen breakdowns. Bold City Heating and Air recognizes these subtle whispers of distress before they intensify into full-blown breakdowns, understanding that each skipped tune-up inches your unit better to failure.
Specialist Tips to Keep Your AC in Leading Forming
- Tidy or Replace Filters Month-to-month: Dust and particles aren't just nuisances-- they choke airflow and force your compressor to overexert.
- Check the Refrigerant Levels: Low refrigerant can turn your cooling dreams into a lukewarm headache, sapping energy and straining parts.
- Inspect Electrical Connections: Loose wires or corroded contacts might stimulate unanticipated failures or fire dangers.
- Clear the Condensate Drain: Clogs here welcome water damage and mold development, quietly undermining your system's health.
Why Routine Tune-Ups Are a Game-Changer
Consider your air conditioner like a finely tuned instrument. Without regular adjustments, it falls out of consistency, creating discord in your house's comfort. Bold City Heating and Air dives deep, not simply skimming surface areas but carefully checking every nook-- from the evaporator coils to the blower motor. This proactive stance avoids the surprise of system failures during the most popular days, turning possible catastrophes into simple footnotes.
Upkeep Task | Frequency | Benefit | |
---|---|---|---|
Filter Cleaning/Replacement | Every 1 month | Enhances air quality & & performance Refrigerant Level Inspect | |
Every year Avoids compressor strain Electrical Examination Yearly Makes sure safety & reliability Condenser | Coil Cleansing Annually Boosts | cooling efficiency Why await a sputtering system to scream for help? Resolving these crucial points early transforms your a/c from | a ticking time bomb into a fortress |
of consistent coolness. Bold City Heating and Air does not just repair-- they anticipate, adjusting their know-how to the special needs your system faces. Keep in mind, in the world of air conditioning system repair, insight is your coolest ally. Specialist Cooling Solutions in Jacksonville, FL Jacksonville, FL, is the biggest city by land location in the contiguous United States and boasts a population that makes it a lively urban center in
Northeast Florida. Known for its comprehensive park system,
lovely Atlantic beaches, and a busy riverfront, Jacksonville provides a distinct mix of city and outdoor way of life. The city is also a center for commerce, culture, and sports, hosting several expert sports groups and numerous cultural celebrations throughout the year. If you need help with a/c unit repair, they encourage you to reach out to Bold City Heating and Air for a totally free assessment and expert suggestions tailored to your cooling needs.
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- Timuquana: Timuquana is a living neighborhood located in Jacksonville, Florida, known for its quiet streets and public parks. It offers a combination of single-family homes and close proximity to nearby amenities and schools.
- San Jose Forest: San Jose Forest is a residential neighborhood located in Jacksonville, Florida, known for its green greenery and kid-friendly atmosphere. The area features a combination of detached houses and local parks, offering a peaceful suburban environment.
- E-Town: E-Town is a dynamic neighborhood located in Jacksonville, Florida, known for its multicultural community and heritage significance. It features a combination 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 displays a wide collection of art covering multiple times and cultures. Guests can also wander beautiful formal gardens that look out over the St. Johns River in Jacksonville FL.
- Jacksonville Zoo and Gardens: Jacksonville Zoo and Gardens showcases a wide range of animals and plants from around the globe. It offers engaging displays, instructive activities, and conservation initiatives for guests of all ages. Jacksonville FL
- Museum of Science and History: The Museum of Science & History in Jacksonville FL features interactive exhibits and a planetarium suitable for all ages. Guests can explore science, history, and culture through interesting displays and educational programs.
- Kingsley Plantation: Kingsley Plantation is a historic site that provides a glimpse into Florida plantation history, encompassing the lives of enslaved people and the planter family. Visitors can investigate the grounds, including the slave quarters, plantation house, and barn. Jacksonville FL
- Fort Caroline National Memorial: Fort Caroline National Memorial honors the 16th-century French try to create a colony in Florida. It provides exhibits and trails investigating the history and natural environment of the area in Jacksonville FL.
- Timucuan Ecological and Historic Preserve: Timucuan Ecological and Historic Preserve safeguards one of the remaining unspoiled coastal wetlands on the Atlantic Coast. It preserves the history of the Timucuan Indians, European explorers, and plantation owners.
- Friendship Fountain: Friendship Fountain is a huge, well-known water fountain in Jacksonville FL. It showcases impressive water shows and lights, which makes it a favorite attraction and gathering place.
- Riverside Arts Market: Riverside Arts Market in Jacksonville FL, is a lively weekly arts and crafts marketplace under the Fuller Warren Bridge. It features local artisans, on-stage music, food vendors, and a stunning view of the St. Johns River.
- San Marco Square: San Marco Square is a charming retail and eating area with a European-style atmosphere. It is famous for its upscale shops, restaurants, and the iconic fountain with lions. Jacksonville FL
- St Johns Town Center: St. Johns Town Center is an exclusive outdoor retail center in Jacksonville FL, showcasing a mix of high-end stores, popular brands, and eateries. It's a top destination for purchasing, eating, and entertainment in Northeast Florida.
- Avondale Historic District: Avondale Historic District showcases appealing early 20th-century architecture and specialty shops. It's a lively neighborhood recognized for its nearby restaurants and historical character. Jacksonville FL
- Treaty Oak Park: Treaty Oak Park is a lovely park in Jacksonville FL, home to a huge, ancient oak tree. The park offers a calm retreat with trails and picturesque views of the St. Johns River.
- Little Talbot Island State Park: Little Talbot Island State Park in Jacksonville FL offers untouched shores and diverse ecosystems. Guests can experience things to do like hiking, camping, and wildlife viewing in this natural coastal setting.
- Big Talbot Island State Park: Big Talbot Island State Park in Jacksonville FL, offers amazing shoreline views and diverse habitats for nature enthusiasts. Discover the one-of-a-kind boneyard beach, hike picturesque trails, and watch abundant wildlife in this gorgeous wildlife sanctuary.
- Kathryn Abbey Hanna Park: Kathryn Abbey Hanna Park in Jacksonville FL, provides a stunning beach, wooded trails, and a 60-acre freshwater lake for recreation. It is a popular spot for camping, surfing, kayaking, and biking.
- Jacksonville Arboretum and Gardens: Jacksonville Arboretum and Gardens provides a stunning ecological escape with varied paths and specialty gardens. Guests can explore a variety of plant life and savor peaceful outside recreation.
- Memorial Park: Memorial Park is a 5.25-acre park that serves as a homage to the over 1,200 Floridians who gave their lives in World War I. The park includes a statue, reflecting pool, and gardens, offering a space for remembrance and reflection. Jacksonville FL
- Hemming Park: Hemming Park is Jacksonville FL's most ancient park, a historic public square holding events, markets, and social get-togethers. It offers a green space in the center of downtown with art installations and a lively ambiance.
- Metropolitan Park: Metropolitan Park in Jacksonville FL offers a stunning waterfront location for gatherings and leisure. With playgrounds, a concert venue, and breathtaking views, it's a well-known destination for residents and tourists alike.
- Confederate Park: Confederate Park in Jacksonville FL, was initially named to pay tribute to rebel soldiers and sailors. It has since been redesignated and re-purposed as a space for local events and recreation.
- Beaches Museum and History Park: Beaches Museum and History Park protects and shares the one-of-a-kind history of Jacksonville's beaches. Investigate exhibits on nearby life-saving, surfing, and early beach communities.
- Atlantic Beach: The city of Atlantic Beach offers a delightful coastal community with stunning beaches and a calm atmosphere. Guests can enjoy surfing, swimming, and investigating local shops and restaurants near Jacksonville FL.
- Neptune Beach: Neptune Beach provides a traditional Florida beach town experience with its sandy beaches and relaxed vibe. Visitors can enjoy surfing, swimming, and exploring local shops and restaurants near Jacksonville FL.
- Jacksonville Beach: Jacksonville Beach is a dynamic coastal city known for its sandy beaches and surf scene. It provides a blend of recreational activities, restaurants, and nightlife along the Atlantic Ocean.
- Huguenot Memorial Park: This park provides a stunning beachfront spot with opportunities for camping, fishing, and birdwatching. Visitors can enjoy the natural charm of the area with its diverse wildlife and scenic coastal views in Jacksonville FL.
- Castaway Island Preserve: Castaway Island Preserve in Jacksonville FL, provides scenic paths and walkways through varied ecosystems. Visitors can enjoy walks in nature, birdwatching, and discovering the splendor of the coastal environment.
- Yellow Bluff Fort Historic State Park: Yellow Bluff Fort Historic State Park in Jacksonville FL safeguards the dirt remnants of a Civil War-era Confederate fort. Visitors can explore the historic location and learn regarding its significance through informative displays.
- Mandarin Museum & Historical Society: The Mandarin Museum & Historical Society safeguards the history of the Mandarin neighborhood in Jacksonville FL. Visitors are able to view displays and artifacts that display the location's unique history.
- Museum of Southern History: The Museum of Southern History exhibits relics and exhibits related to the history and culture of the Southern United States. Visitors are able to explore a variety of topics, such as 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 see rescued big cats and other exotic animals. It's a non-profit organization dedicated to providing a safe, loving, forever home for these animals.
- Air Conditioning Installation: Proper setup of cooling systems guarantees effective and agreeable indoor climates. This critical process guarantees best performance and lifespan of climate control units.
- Air Conditioner: ACs cool indoor spaces by extracting heat and humidity. Proper installation by certified technicians guarantees effective performance and ideal climate control.
- Hvac: Hvac systems control temperature and air's condition. They are crucial for setting up environmental control answers in structures.
- Thermostat: A Thermostat is the control center for adjusting temperature in HVAC systems. It tells the cooling unit to activate and deactivate, maintaining the desired indoor environment.
- Refrigerant: Refrigerant is essential for temperature control systems, extracting heat to produce cold air. Correct treatment of refrigerants is essential during HVAC installation for effective and safe operation.
- Compressor: This Compressor is a vital heart of your cooling system, pumping refrigerant. This process is critical for efficient temperature control in climate control systems.
- Evaporator Coil: The Evaporator Coil takes in heat from indoor air, bringing it down. This component is essential for efficient climate control system installation in buildings.
- Condenser Coil: The Condenser Coil is an integral component in refrigeration systems, dissipating heat outside. It aids the heat exchange needed for efficient indoor climate management.
- Ductwork: Ductwork is vital for dispersing treated air throughout a building. Suitable duct design and arrangement are vital for effective climate regulation system location.
- Ventilation: Efficient Ventilation is essential for proper air flow and indoor air quality. It has a vital role in guaranteeing peak operation and effectiveness of climate control systems.
- Heat Pump: Heat Pumps move heat, providing both heating and cooling. They're key parts in modern climate control system setups, offering energy-efficient temperature regulation.
- Split System: Split System provide both cooling and heating via an indoor unit linked to an outdoor compressor. They offer a ductless answer for temperature regulation in specific rooms or areas.
- Central Air Conditioning: Central air conditioning systems cool entire homes from a single, powerful unit. Correct setup of these systems is vital for streamlined and effective home cooling.
- Energy Efficiency Ratio: Energy Efficiency Ratio measures cooling effectiveness: higher Energy Efficiency Ratio indicates better performance and lower energy consumption for climate control systems. Selecting a unit with a good Energy Efficiency Ratio can significantly lower long-term costs when setting up a new climate control system.
- Variable Speed Compressor: Variable Speed Compressor change refrigeration output to meet demand, enhancing performance and convenience in HVAC systems. This precise modulation decreases energy loss and preserves stable thermals in indoor environments.
- Compressor Maintenance: Compressor Maintenance ensures effective operation and longevity in refrigeration systems. Ignoring it can lead to expensive repairs or system breakdowns when setting up climate control.
- Air Filter: Air Filter trap dirt and debris, making sure of pure airflow within HVAC systems. This improves system efficiency and indoor air quality throughout temperature regulation setup.
- Installation Manual: The Installation Manual offers crucial guidance for appropriately setting up a cooling system. It assures proper procedures are used for optimal performance and safety during the unit's setup.
- Electrical Wiring: Electrical Wiring is essential for powering and controlling the components of climate control systems. Suitable wiring assures safe and efficient operation of the cooling and heating units.
- Indoor Unit: Indoor Unit distributes conditioned air within a room. It's a key part for climate control systems, ensuring suitable temp control in structures.
- Outdoor Unit: The Outdoor Unit contains the compressor and condenser, releasing heat outside. It's crucial for a complete climate control system installation, guaranteeing effective cooling inside.
- Maintenance: Regular care ensures effective operation and extends the lifespan of climate control systems. Proper Maintenance averts failures and optimizes the performance of installed cooling systems.
- Energy Efficiency: Energy Efficiency is vital for reducing energy use and costs when setting up new climate control systems. Prioritizing effective equipment and suitable setup minimizes environmental impact and maximizes long-term savings.
- Thermodynamics: Thermodynamics explains how heat moves and converts energy, crucial for cooling setup system. Efficient climate control design relies on thermodynamic principles to maximize energy use during system placement.
- Building Codes: Construction regulations assure suitable and safe HVAC system setup in structures. They control aspects like energy efficiency and ventilation for climate control systems.
- Load Calculation: Load calculations determines the heating and cooling needs of a space. This is vital for selecting suitably sized HVAC equipment for optimal environmental control.
- Mini Split: Mini Splits provide a ductless approach to temperature management, providing focused heating and cooling. The simple installation makes them suitable for spaces where adding ductwork for climate modification is impractical.
- Air Handler: The Air Handler moves treated air around a building. It is a crucial component for correct climate control system setup.
- Insulation: Thermal protection is crucial for keeping effective temperature regulation within a building. It minimizes heat transfer, lessening the workload on air conditioning and improving climate control setups.
- Drainage System: Drainage systems clear condensate produced by air conditioning equipment. Adequate drainage avoids water damage and assures effective operation of HVAC setups.
- Filter: Strainers are critical components that eliminate pollutants from the air during the installation of climate control systems. This ensures cleaner air circulation and safeguards the system's internal components.
- Heating Ventilation And Air Conditioning: Heating Ventilation And Air Conditioning systems regulate inside environment by controlling temperature, humidity, and air condition. Proper setup of these systems guarantees economical and effective cooling and environmental control within buildings.
- Split System Air Conditioner: Split System Air Conditioner offer efficient refrigeration and heating by separating the compressor and condenser from the air handler. Their structure simplifies the procedure of setting up climate control in homes and businesses.
- Hvac Technician: Hvac Technicians are skilled professionals who specialize in the configuration of temperature regulation systems. They guarantee appropriate operation and effectiveness of these systems for optimal indoor comfort.
- Indoor Air Quality: Indoor Air Quality greatly affects well-being and health, so HVAC system installation should prioritize filtration and ventilation. Proper system planning and setup is essential for optimizing air quality.
- Condensate Drain: This Condensate Drain eliminates water generated throughout the cooling operation, stopping harm and keeping system effectiveness. Correct drain assembly is vital for effective climate control installation and extended performance.
- Variable Refrigerant Flow: Variable Refrigerant Flow (VRF) systems precisely control refrigerant volume to various zones, providing tailored cooling and heating. The technology is essential for creating effective and flexible climate control in building setups.
- Building Automation System: Building Automation System orchestrate and streamline the operation of HVAC devices. This leads to improved climate control and power savings in buildings.
- Air Conditioning: HVAC systems regulate indoor temperature and air quality. Proper installation of these systems is vital for optimized and effective climate control.
- Temperature Control: Precise temperature regulation is essential for effective climate control system setup. It ensures optimal performance and comfort in newly installed cooling systems.
- Thermistor: Thermistors are temperature-sensitive resistors used in climate control systems to measure accurately air temperature. This data helps to regulate system operation, guaranteeing optimal performance and energy efficiency in ecological control arrangements.
- Thermocouple: Thermocouples are temperature sensors crucial for assuring proper HVAC system installation. They correctly assess temperature, enabling precise modifications and optimal climate control function.
- Digital Thermostat: Digital Thermostats accurately control temperature, improving HVAC system operation. They are essential for establishing home climate control systems, ensuring effective and comfortable environments.
- Programmable Thermostat: Programmable Thermostats optimize climate control systems by allowing personalized temperature routines. This leads to improved energy savings and comfort in residential AC setups.
- Smart Thermostat: Clever thermostats improve house temperature management by learning user preferences and adjusting temperatures on their own. They play a key role in today's HVAC system setups, improving energy efficiency and convenience.
- Bimetallic Strip: A Bimetallic Strip, composed of two metals that have different expansion rates, bends in response to temperature changes. This characteristic is utilized in HVAC systems to operate thermostats and adjust heating or cooling operations.
- Capillary Tube Thermostat: A Capillary Tube Thermostat precisely regulates temperature in cooling systems via remote sensing. The component is vital for keeping desired climate control inside buildings.
- Thermostatic Expansion Valve: The Thermostatic Expansion Valve regulates refrigerant stream into the evaporator, keeping ideal cooling. This component is crucial for effective operation of refrigeration and air conditioning systems in buildings.
- Setpoint: Setpoint is the desired temperature a climate control system strives to reach. It directs the system's performance during climate control configurations to maintain desired comfort degrees.
- Temperature Sensor: Temperature Sensors are vital for controlling heating, ventilation, and cooling systems by tracking air temperature and ensuring efficient climate control. Their data helps optimize system performance during climate control setup and maintenance.
- Feedback Loop: A Feedback Loop assists in regulating temperature during climate control system installation by continuously monitoring and modifying settings. This ensures optimal performance and energy efficiency of installed residential cooling.
- Control System: Control Systems regulate temperature, moisture, and airflow in environmental conditioning setups. They ensure optimal comfort and energy savings in climate-controlled environments.
- Thermal Equilibrium: Thermal Equilibrium is achieved when parts reach the same temperature, vital for efficient climate control system setup. Proper balance guarantees maximum performance and energy conservation in placed cooling systems.
- Thermal Conductivity: Thermal Conductivity dictates how efficiently materials move heat, affecting the cooling system configuration. Selecting materials with suitable thermal properties guarantees peak performance of installed climate control systems.
- Thermal Insulation: Thermal insulation minimizes heat transfer, assuring efficient cooling by lessening the workload on climate control systems. This improves energy efficiency and preserves consistent temperatures in buildings.
- On Off Control: On-Off Control keeps wanted temperatures by fully turning on or deactivating cooling systems. This easy way is vital for controlling environment within buildings throughout environmental control system setup .
- Pid Controller: PID Controllers precisely regulate temperature in HVAC units. This makes sure efficient climate control during facility climate setup and functioning.
- Evaporator: This Evaporator takes in heat from inside a location, chilling the air. This is a vital component in temperature control systems created for home comfort.
- Condenser: This Condenser unit is a critical component in cooling equipment, dissipating heat extracted from the indoor space to the outside environment. Its correct installation is key for efficient climate control system placement and performance.
- Chlorofluorocarbon: CFCs were previously common refrigerants which helped with cooling in many building systems. Their part has diminished due to environmental concerns about ozone depletion.
- Hydrofluorocarbon: Hydrofluorocarbons are coolants frequently used in cooling systems for buildings and cars. Their correct handling is crucial during the setup of climate control systems to prevent environmental damage and guarantee effective operation.
- Hydrochlorofluorocarbon: Hydrochlorofluorocarbons were previously commonly used coolants in HVAC systems for structures. Their phase-out has caused the adoption of more sustainable alternatives for new HVAC systems.
- Global Warming Potential: Global Warming Potential (GWP) indicates how much a certain mass of greenhouse gas contributes to global warming over a set period compared to carbon dioxide. Choosing refrigerants with lower GWP is key when setting up climate control systems to lessen environmental impact.
- Ozone Depletion: Ozone Depletion from refrigerants poses environmental risks. Technicians servicing cooling units must follow regulations to prevent further harm.
- Phase Change: Phase Changes of refrigerants are vital for efficiently conveying heat in climate control systems. Evaporation and condensation cycles allow cooling by absorbing heat indoors and releasing it outdoors.
- Heat Transfer: Heat Transfer principles are key for effective climate control system installation. Knowing conduction, convection, and radiation guarantees prime system operation and energy savings during the course of setting up home cooling.
- Refrigeration Cycle: The Refrigeration Cycle transfers heat, allowing refrigeration in climate-control systems. Proper setup and maintenance make sure of effective performance and longevity of these cooling solutions.
- Environmental Protection Agency: EPA regulates refrigerants and sets standards for HVAC system maintenance to safeguard the ozone layer and lower greenhouse gas emissions. Technicians working with refrigeration equipment must be certified to ensure proper refrigerant management and prevent environmental damage.
- Leak Detection: Leak Detection assures the integrity of refrigerant pipes after climate control system placement. Identifying and addressing leaks is vital for peak function and ecological safety of newly installed climate control systems.
- Pressure Gauge: Pressure gauges are critical tools for checking refrigerant levels during HVAC system setup. They assure peak performance and prevent damage by verifying pressures are within specified ranges for proper cooling operation.
- Expansion Valve: The Expansion Valve governs refrigerant stream in refrigeration systems, allowing for efficient heat absorption. It's a key component for peak performance in environmental control setups.
- Cooling Capacity: Cooling capacity determines how effectively a system can lower the temperature of a space. Choosing the correct capacity is important for peak performance in environmental control system placement.
- Refrigerant Recovery: Refrigerant Recovery is the procedure of removing and storing refrigerants during HVAC system setups. Correctly recovering refrigerants stops environmental harm and ensures effective new cooling equipment placements.
- Refrigerant Recycling: Refrigerant Recycling recovers and recycles refrigerants, reducing environmental impact. This procedure is essential when installing climate control systems, guaranteeing responsible handling and preventing ozone depletion.
- Safety Data Sheet: Safety Data Sheets (SDS) offer critical information on the safe handling and possible hazards of chemicals utilized in cooling system installation. Technicians depend on SDS data to defend themselves and avoid accidents during HVAC equipment installation and connection.
- Synthetic Refrigerant: Synthetic Refrigerants are vital liquids used in refrigeration systems to transfer heat. Their correct handling is essential for efficient climate control setup and maintenance.
- Heat Exchange: Heat Exchange is essential for cooling buildings, enabling efficient temperature regulation. It's a critical process in climate control system configuration, assisting the movement of heat to supply comfortable indoor spaces.
- Cooling Cycle: Cooling Cycle is the basic procedure of heat extraction, using refrigerant to absorb and give off heat. This cycle is essential for efficient climate control system installation in buildings.
- Scroll Compressor: Scroll compressors efficiently pressurize refrigerant to power cooling systems. They are a vital component for efficient temperature regulation in buildings.
- Reciprocating Compressor: Piston Compressors are vital parts that compress refrigerant in refrigeration systems. They aid heat exchange, allowing efficient climate control within structures.
- Centrifugal Compressor: Centrifugal Compressors are critical components that raise refrigerant pressure in big climate control systems. They effectively move refrigerant, allowing effective cooling and heating across wide areas.
- Rotary Compressor: Rotary Compressor represent a key component in cooling systems, utilizing a spinning mechanism to compress refrigerant. Their efficiency and compact size render them suitable for climate control setups in diverse applications.
- Compressor Motor: The Compressor Motor serves as the main force behind the refrigeration process, moving refrigerant. It is crucial for proper climate control system installation and function in buildings.
- Compressor Oil: Compressor lubricant oils and seals mechanical parts inside a systems' compressor, ensuring effective refrigerant pressurization for proper climate regulation. It is crucial to choose the right type of oil throughout system setup to ensure longevity and optimal performance of the refrigeration unit.
- Pressure Switch: A Pressure Switch tracks refrigerant amounts, ensuring the system works securely. It stops harm by turning off the cooling apparatus if pressure drops outside the acceptable spectrum.
- Compressor Relay: A Compressor Relay is an electrical device that manages the compressor motor in cooling setups. It ensures the compressor starts and stops properly, allowing effective temperature control within climate control systems.
- Suction Line: The Suction Line, a key component in cooling systems, moves refrigerant vapor from the evaporator to the compressor. Appropriate sizing and insulation of this line are vital for efficient system operation during climate control setup.
- Discharge Line: The Discharge Line carries hot, high-pressure refrigerant gas from the compressor to the condenser. Proper sizing and installation of the discharge line are critical for the best cooling system setup.
- Compressor Capacity: Compressor Capacity dictates the cooling power of a system for indoor climate control. Choosing the right size ensures effective temperature regulation during climate control installation.
- Cooling Load: Cooling Load is the volume of heat that needs to be taken away from a space to keep a preferred temperature. Accurate cooling load calculation is important for appropriate HVAC system installation and size.
- Air Conditioning Repair: Air Conditioning Repair ensures systems operate perfectly after they are installed. It's essential for maintaining efficient climate control systems put in place.
- Refrigerant Leak: Refrigerant Leaks decrease cooling efficiency and can cause equipment failure. Resolving these leaks is critical for correct climate control system configuration, assuring peak operation and lifespan.
- Seer Rating: SEER score indicates an HVAC system's refrigeration performance, impacting long-term energy costs. Elevated SEER numbers mean increased energy savings when establishing climate control.
- Hspf Rating: HSPF rating demonstrates the heating efficiency of heat pumps. Higher ratings indicate better energy efficiency during climate control installation.
- Preventative Maintenance: Preventative Maintenance makes sure HVAC systems work efficiently and dependably after installation. Regular servicing reduces failures and increases the lifespan of HVAC systems.
- Airflow: Airflow assures efficient cooling and heating distribution across a building. Proper Airflow is vital for peak operation and comfort in climate control systems.
- Electrical Components: Electrical Components are vital for energizing and managing systems that govern indoor temperature. They ensure proper functioning, safety, and effectiveness in temperature regulation systems.
- Refrigerant Charging: Refrigerant Charging is the procedure of adding the correct quantity of refrigerant to a cooling system. This assures peak performance and efficiency when configuring climate control units.
- System Diagnosis: System Diagnosis detects possible issues before, while, and after HVAC system installation. It guarantees peak operation and prevents future troubles in HVAC installations.
- Hvac System: HVAC systems govern heat, moisture, and atmosphere quality in structures. They are vital for creating climate-control solutions in domestic and commercial spaces.
- Ductless Air Conditioning: Ductless systems provide targeted temperature control not needing extensive ductwork. They make easier climate control setup in spaces lacking pre-existing duct systems.
- Window Air Conditioner: Window air conditioners are standalone devices installed in windows to chill single spaces. They offer a straightforward method for localized climate control within a building.
- Portable Air Conditioner: Portable AC units provide a versatile cooling solution for spaces without central systems. They can also offer temporary temperature regulation during HVAC system setups.
- System Inspection: System Inspection ensures correct setup of cooling systems by verifying component integrity and compliance to installation standards. This procedure guarantees effective operation and prevents future malfunctions in climate control setups.
- Coil Cleaning: Cleaning coils ensures effective heat transfer, crucial for peak system performance. This maintenance process is vital for proper setup of climate control systems.
- Refrigerant Recharge: Refrigerant Recharge is vital for recovering cooling ability in air conditioning units. It guarantees peak performance and lifespan of recently installed climate control equipment.
- Capacitor: Capacitors provide the needed energy boost to start and run motors inside of climate control systems. Their correct function ensures effective and reliable operation of the cooling unit.
- Contactor: The Contactor serves as an electrical switch that controls power to the outdoor unit's components. It enables the cooling system to activate when necessary.
- Blower Motor: This Blower Motor circulates air via the ductwork, allowing for effective heating and cooling delivery within a building. It is a crucial component for indoor climate control systems, assuring stable temperature and airflow.
- Overheating: Overheating can severely hamper the performance of recently installed climate control systems. Technicians must resolve this issue to guarantee efficient and reliable cooling operation.
- Troubleshooting: Troubleshooting identifies and resolves problems that arise during climate control system installation. Effective troubleshooting guarantees best system performance and prevents future issues during building cooling appliance installation.
- Refrigerant Reclaiming: Refrigerant Reclaiming retrieves and recycles used refrigerants. This procedure is crucial for environmentally responsible HVAC system setup.
- Global Warming: Global Warming increases the demand or for cooling systems, requiring demanding more frequent setups installations. This heightened increased need drives fuels innovation in energy-efficient power-saving climate control solutions options.
- Montreal Protocol: The Montreal Protocol eliminates ozone-depleting materials used in cooling systems. This shift requires using alternative refrigerants in new climate control setups.
- Greenhouse Gas: Greenhouse gases trap warmth, affecting the power efficiency and environmental footprint of weather control system setups. Selecting refrigerants with lower global warming potential is vital for eco-friendly weather control implementation.
- Cfc: CFCs were once essential refrigerants in cooling systems for structures and vehicles. Their use has been phased out due to their harmful impact on the ozone layer.
- Hcfc: Hcfc were once typical refrigerants used in refrigeration systems for structures and vehicles. They facilitated the process of setting up climate control systems, but are now being phased out due to their ozone-depleting properties.
- Hfc: HFCs are commonly used refrigerants in refrigeration systems for buildings. Their correct handling is critical during the establishment of these systems to minimize environmental impact.
- Refrigerant Oil: Refrigerant oil lubricates the compressor in cooling systems, ensuring smooth operation and a long lifespan. It's crucial for the correct operation of cooling setups.
- Phase-Out: Phase-Out is related to the progressive reduction of specific refrigerants with elevated global warming capacity. This impacts the choice and servicing of climate control systems in buildings.
- Gwp: GWP indicates a refrigerant's potential to heat the planet if discharged. Lower GWP refrigerants are progressively favored in climate-friendly HVAC system setups.
- Odp: ODP refrigerants harm the ozone layer, impacting regulations for cooling system installation. Installers must utilize ozone-friendly alternatives during HVAC equipment placement.
- Ashrae: Ashrae establishes criteria and guidelines for HVAC systems setup. The criteria ensure effective and secure environmental control systems implementation in structures.
- Hvac Systems: Hvac Systems provide temperature and air quality regulation for indoor settings. They are critical for establishing cooling setups in buildings.
- Refrigerant Leaks: Refrigerant Leaks lower cooling system effectiveness and may damage the environment. Suitable procedures during climate control unit setup are crucial to prevent these leaks and ensure optimal performance.
- Hvac Repair Costs: Hvac Repair Costs can greatly affect choices about switching to a new temperature system. Unexpected repair bills may encourage homeowners to invest in a full home comfort setup for future savings.
- Hvac Installation: Hvac Installation involves installing heating, air flow, and cooling systems. It's essential for allowing efficient climate control within structures.
- Hvac Maintenance: Hvac Maintenance ensures efficient performance and extends system life. Appropriate upkeep is crucial for seamless climate control system setups.
- Hvac Troubleshooting: Hvac Troubleshooting pinpoints and resolves issues in heating, ventilation, and cooling systems. It guarantees peak operation during climate control unit setup and operation.
- Zoning Systems: Zoning Systems separate a building into separate areas for customized temperature regulation. This method improves comfort and energy efficiency during HVAC setup.
- Compressor Types: Different Compressor Types are critical components for efficient climate control systems. Their selection significantly impacts system effectiveness and performance in environmental comfort applications.
- Compressor Efficiency: Compressor Efficiency is vital, dictating how effectively the system cools a room for a given energy input. Improving this efficiency directly impacts cooling system installation costs and long-term operational expenses.
- Compressor Overheating: Compressor Overheating can seriously damage the device's core, resulting in system failure. Proper installation ensures sufficient air flow and refrigerant amounts, avoiding this issue in climate control system placements.
- Compressor Failure: Compressor malfunction halts the cooling process, demanding expert service during climate control system configurations. A defective compressor jeopardizes the entire system's efficiency and lifespan when incorporating it into a building.
- Overload Protector: An Overload Protector protects the compressor motor from overheating during climate control system setup. It stops harm by automatically disconnecting power when too much current or temperature is detected.
- Fan Motor: Fan motors circulate air across evaporator and condenser coils, a crucial process for effective climate control system setup. They facilitate heat transfer, guaranteeing optimal cooling and heating operation within the specified space.
- Refrigerant Lines: Refrigerant Lines are crucial components that join the indoor and outdoor units, circulating refrigerant to facilitate cooling. Their proper installation is vital for efficient and productive climate control system installation.
- Condensing Unit: The Condensing Unit is the outdoor component in a cooling system. The unit rejects heat from the refrigerant, allowing indoor temperature control.
- Heat Rejection: Heat Rejection is vital for refrigeration systems to efficiently remove unwanted heat from a conditioned space. Proper Heat Rejection ensures efficient performance and longevity of climate control systems.
- System Efficiency: System Efficiency is vital for reducing energy use and operational expenses. Improving efficiency during climate control configuration guarantees long-term savings and environmental benefits.
- Pressure Drop: Pressure decrease is the reduction in fluid pressure as it flows through a setup, impacting airflow in environmental control setups. Properly controlling pressure decrease is essential for optimal performance and efficiency in environmental comfort systems.
- Subcooling: Subcooling process guarantees best equipment performance by cooling the refrigerant under its condensing temperature. This process stops flash gas, increasing refrigeration capacity and efficiency during HVAC equipment installation.
- Superheat: Superheat ensures that just steam refrigerant goes into the compressor, which prevents damage. It's crucial to measure superheat during HVAC system setup to optimize cooling performance and efficiency.
- Refrigerant Charge: Refrigerant Charge is the amount of refrigerant in a unit, crucial for peak cooling performance. Proper charging assures efficient heat transfer and avoids damage during climate control setup.
- Corrosion: Corrosion degrades metallic parts, possibly leading to leakage and system malfunctions. Guarding against Corrosion is essential for maintaining the effectiveness and lifespan of climate control arrangements.
- Fins: Fins augment the surface area of coils, boosting heat transfer effectiveness. This is vital for best performance in HVAC system configurations.
- Copper Tubing: Copper piping is essential for refrigerant movement in climate control systems owing to its robustness and efficient heat transfer. Its dependable connections ensure suitable system function during setup of climate units.
- Aluminum Tubing: Aluminum Tubing is vital for transporting refrigerant in climate control systems. Their lightweight and corrosion-resistant properties render them perfect for connecting internal and external units in HVAC setups.
- Repair Costs: Unforeseen repairs can significantly affect the overall expense of setting up a new climate control system. Budgeting for potential Repair Costs ensures a more accurate and comprehensive cost assessment when implementing such a system.
Bold City Heating & Air
4.9(1,687)
Air conditioning repair service·
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8400 Baymeadows Way Suite 1, Jacksonville, FL 32256, United States
Open 24 hours
+1 904-379-1648
6C9C+2H Baymeadows Center, Jacksonville, FL, USA
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From the owner
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 …
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1,687 reviews
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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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Jacksonville’s Best HVAC Company
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!
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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.
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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.

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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!

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Website history
Air conditioning
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]
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]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]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 BTUIT 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]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]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]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]
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]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]


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]
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]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]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
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