AC Repair: Professional A/c Service Ensures Your Home Stays Cool And Comfy During Hot Days

Types of A/c Repair Work Solutions

Ever had your air conditioner sputter to a halt just as the summer season sun peaks? It's an aggravating situation-- one that makes you understand the number of parts must work in consistency for cool air to circulation. From frozen coils to refrigerant leaks, the challenges differ, however the services don't have to be a secret.

Common Air Conditioner Repair Categories

Refrigerant Recharge and Leakage Repair: Without the right amount of refrigerant, your system struggles to cool your space. Determining leaks is essential to restoring effectiveness.
Compressor and Fan Motor Repairs: These parts are the heart and lungs of your AC. When they fail, air flow and cooling capacity plummet.
Thermostat Calibration and Replacement: Often the culprit is your thermostat sending combined signals-- changing or switching it out brings comfort back on track.
Electrical Element Repair: Faulty circuitry or capacitors disrupt performance, frequently causing unexpected shutdowns or irregular behavior.
Drain Line Cleansing and Repair: Blocked condensate lines can cause water damage and system shutdowns if disregarded.

How Bold City Heating and Air Manages These Obstacles

Picture strolling into your home after a blistering day, welcomed by a sanctuary of cool air. Bold City Heating and Air changes that dream into truth by mastering every element of AC repair. They do not simply spot leakages or swap parts-- they diagnose the origin with surgical accuracy.

Frozen coils? They thaw the problem and prevent future freeze-ups. Electrical problems? They trace every wire to make sure stability and security. Thermostat troubles? They fine-tune settings for ideal environment control. No problem is too tangled, no malfunction too unknown.

What sets Strong City apart is their commitment to thoroughness. Each repair unfolds like a carefully choreographed dance, ensuring your system runs smoothly, efficiently, and silently. It's not almost fixing what's broken; it's about bring back peace of mind and cool comfort, all while extending the life of your system.

Deciphering the Mysteries of Air Conditioner Malfunctions

Imagine stepping into your home after a scorching day, only to be greeted by a wave of warm, stagnant air. That sinking feeling? It normally implies your cooling system is having a hard time. Among the myriad of hiccups, refrigerant leaks typically play the bad guy. Not just do they sap the cooling power, however they quietly erode efficiency, leaving your energy costs to balloon. Have you ever wondered why your AC cycles on and off so often? This phenomenon, referred to as brief cycling, might be the system's desperate cry for aid due to dirty filters or malfunctioning thermostat calibration.

Expert Insights: Decoding the Indications

Bold City Heating and Air recognizes how annoying it can be when your unit declines to blow cold air or, even worse, floods your home with unanticipated moisture. Their service technicians approach each issue with an investigator's precision. For circumstances, blocked condensate drains pipes frequently masquerade as minor annoyances but can cause water damage if ignored.

Idea Just Pros Share

Frequently examine and clean your evaporator coil; dust buildup can lower cooling efficiency by up to 30%.
Ensure your thermostat is positioned away from direct sunlight or heat-emitting appliances to avoid incorrect readings.
Listen for unusual sounds like rattling or hissing-- these typically precede compressor or refrigerant problems.
Look for ice formation on coils; it signifies air flow restriction and demands instant attention.

Typical Issues and Their Remedies

Problem	Possible Cause	Quick Repair
Warm Air Blowing	Refrigerant leakage or filthy filter	Seal leaks and change filters
Brief Cycling	Thermostat or electrical concerns	Recalibrate thermostat and check wiring
Water Leak	Obstructed condensate drain	Clear the drain pipeline
Uncommon Sounds	Loose parts or compressor concerns	Tighten parts or service compressor

Necessary Instruments for Detecting Air Conditioner Troubles

Ever attempted repairing an a/c unit with simply a screwdriver and a prayer? The reality is far more technical. The heart of effective AC repair depend on the precision of the tools wielded. A manifold gauge set, for circumstances, isn't simply an expensive device; it's the mechanic's stethoscope, revealing the surprise pressures within the system's veins. Without it, thinking the refrigerant levels resembles checking out tea leaves.

Bold City Heating and Air comprehends how vital these subtle readings are. They approach each system with a toolkit that's not just comprehensive however thoroughly adjusted, making sure every twist, turn, and valve adjustment hits the mark. Their understanding of the nuances in pressure variations and temperature gradients changes a task from uncertainty to science.

Tools That Transform Repair Work into Art

Digital Multimeter: Procedures voltage, current, and resistance. Finds electrical faults that can quietly undermine your air conditioner unit.
Thermometer: Vital for identifying temperature differentials across coils, indicating air flow or refrigerant issues.
Leak Detectors: Utilizing UV color or electronic sensing units, these reveal the invisible leakages that drain pipes efficiency.
Vacuum Pumps: Leave wetness and air, essential in preparing the system for a flawless recharge.

In my experience, even the smallest overlooked information-- like a slightly worn gasket-- can cascade into a system-wide inadequacy - Bold City Heating and Air. Vibrant City's technicians don't just fix; they anticipate the subtle whispers of wear and tear before they yell out as breakdowns

Expert Tips from the Field

Always double-check manifold gauge readings at various times of the day; ambient temperature shifts can impact precision.
Use a microamp clamp meter to find faint electrical draws that suggest failing capacitors or motors.
When leaving a system, look for the "searching" effect in the vacuum gauge, an expert hint indicating trapped moisture.

Tools are only as good as the hands that wield them. Bold City Heating and Air's mastery of their instruments elevates cooling repair from a mere service to a carefully tuned craft.

Vital Safety Steps for AC Repair Work

Electrical risks prowl in every corner of a/c repair, especially when dealing with capacitors holding recurring charge. Have you ever wondered why a sudden jolt can shock even skilled specialists? It's because a charged capacitor can keep dangerous energy long after the unit is powered down. That's why Bold City Heating and Air demands strenuous discharge procedures before touching any parts.

Working around refrigerants requires not only accuracy but likewise alertness. Leaks can quietly toxin the air or trigger frostbite on contact. When tackling these undetectable hazards, protective gear isn't optional-- it's a lifeline. They understand that fumbling without correct gloves and goggles is akin to dancing with threat.

For those venturing into do it yourself repairs, hearken these professional ideas:

Always cut power at the breaker panel before opening the unit.
Utilize a multimeter to validate no voltage before proceeding.
Wear insulated gloves and eye protection to safeguard versus electric shock and refrigerant direct exposure.
Manage refrigerant lines with care-- avoid punctures or sharp bends that can cause leakages.
Keep a fire extinguisher ranked for electrical fires close by.

Envision the horror of an unexpected stimulate in a dusty, enclosed space-- fires fire up in the blink of an eye. Bold City Heating and Air's professionals employ careful cleaning regimens to eliminate dust build-up that might otherwise sustain unexpected combustion.

Safety Checklist Before Starting Repairs

Security Action	Why It Matters
Power Seclusion	Avoids accidental electrocution and devices damage
Capacitor Discharge	Gets rid of stored electrical energy that can trigger shocks
Protective Equipment Use	Shields skin and eyes from refrigerants and particles
Drip Detection	Ensures air quality and avoids refrigerant loss
Workspace Ventilation	Decreases inhalation dangers and dissipates flammable gases

In the world of AC repair, rushing through security checks is like avoiding actions on a high wire-- one mistake can waterfall into disaster. Bold City Heating and Air's commitment to these safety measures changes a dangerous venture into a managed, foreseeable operation. They remain alert, understanding that real proficiency in air conditioning repair work is as much about protecting lives as it has to do with restoring comfort.

Cooling Solutions in Jacksonville, FL

Jacksonville, FL is a lively city known for its comprehensive park system, gorgeous beaches, and growing arts scene. As the largest city by location in the continental United States, it uses residents and visitors plenty of outdoor activities, including boating along the St - Bold City Heating and Air. Johns River and exploring the Jacksonville Zoo and Gardens. The city's warm climate makes efficient air conditioning necessary for comfort and health throughout the year

For those in requirement of a/c services, Bold City Heating and Air provides professional assistance and complimentary consultations to assist ensure your home or company stays cool and comfy. Reach out to them for trustworthy recommendations and services on air conditioning repair work customized to your requirements.

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Cummer Museum of Art and Gardens: The Cummer Museum of Art and Gardens showcases a varied collection of art representing multiple times and cultures. Visitors can also explore beautiful formal gardens that look out over the St. Johns River in Jacksonville FL.
Jacksonville Zoo and Gardens: Jacksonville Zoo and Gardens showcases a varied assortment of animals and flora from across the world. It provides interesting exhibits, instructive activities, and conservation initiatives for guests of all ages. Jacksonville FL
Museum of Science and History: This Museum of Science & History in Jacksonville FL showcases interactive exhibits and a planetarium appropriate for all ages. Visitors can discover science, history, and culture through engaging displays and informative programs.
Kingsley Plantation: Kingsley Plantation is a historic site that offers a glimpse into Florida's plantation history, encompassing the lives of enslaved people and the planter family. Visitors can explore the grounds, including the slave quarters, plantation house, and barn. Jacksonville FL
Fort Caroline National Memorial: Fort Caroline National Memorial remembers the 16th-century French endeavor to create a colony in Florida. It offers displays and paths exploring the history and natural environment of the area in Jacksonville FL.
Timucuan Ecological and Historic Preserve: Timucuan Ecological and Historic Preserve protects one of the last unspoiled coastal marshes on the Atlantic Coast. It preserves the history of the Timucuan Indians, European explorers, and plantation owners.
Friendship Fountain: Friendship Fountain is a large, iconic water fountain in Jacksonville FL. It displays impressive water features and lights, making it a popular attraction and place to gather.
Riverside Arts Market: Riverside Arts Market in Jacksonville FL, is a lively weekly arts and crafts marketplace under the Fuller Warren Bridge. It showcases local craftspeople, 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 dining district with a European-style atmosphere. It is known for its high-end shops, eateries, and the well-known fountain featuring lions. Jacksonville FL
St Johns Town Center: St. Johns Town Center is an upscale outdoor shopping mall in Jacksonville FL, featuring a mix of high-end stores, popular labels, and eateries. It is a premier spot for purchasing, dining, and entertainment in North East Florida.
Avondale Historic District: Avondale Historic District presents charming early 20th-century architecture and specialty shops. It's a vibrant neighborhood recognized for its local restaurants and historical character. Jacksonville FL
Treaty Oak Park: Treaty Oak Park is a lovely green space in Jacksonville FL, home to a giant, ancient oak tree. The park provides a peaceful retreat with trails and scenic views of the St. Johns River.
Little Talbot Island State Park: Little Talbot Island State Park in Jacksonville FL provides untouched shores and varied ecosystems. Guests can partake in recreation such as hiking, camping, and observing wildlife in this unspoiled coastal environment.
Big Talbot Island State Park: Big Talbot Island State Park in Jacksonville FL, provides amazing coastal views and diverse ecosystems for nature enthusiasts. Explore the one-of-a-kind boneyard beach, hike picturesque trails, and watch plentiful wildlife in this lovely natural sanctuary.
Kathryn Abbey Hanna Park: Kathryn Abbey Hanna Park in Jacksonville FL, offers a beautiful beach, forested trails, and a 60-acre fresh water lake for recreation. It's a well-known place for camping, surfing, kayaking, and biking.
Jacksonville Arboretum and Gardens: Jacksonville Arboretum and Gardens provides a beautiful natural getaway with multiple paths and themed gardens. Guests can explore a variety of plant life and relish peaceful outdoor recreation.
Memorial Park: Memorial Park is a 5.25-acre area that serves as a homage to the more than 1,200 Floridians who gave their lives in World War I. The park includes a statue, pool, and gardens, offering a place for memory and reflection. Jacksonville FL
Hemming Park: Hemming Park is Jacksonville FL's most ancient park, a historic public square hosting events, bazaars, and community gatherings. It provides a lush space in the center of downtown with art installations and a vibrant ambiance.
Metropolitan Park: Metropolitan Park in Jacksonville FL offers a lovely waterfront location for gatherings and leisure. With playgrounds, a concert venue, and scenic vistas, it's a popular spot for locals and visitors as well.
Confederate Park: Confederate Park in Jacksonville FL, was originally designated to honor rebel soldiers and sailors. It has since been renamed and transformed as a place for community events and recreation.
Beaches Museum and History Park: Beaches Museum and History Park safeguards and relays the distinct history of Jacksonville's beaches. Explore exhibits on local life-saving, surfing, and early beach communities.
Atlantic Beach: The city of Atlantic Beach provides a delightful coastal area with gorgeous beaches and a peaceful atmosphere. Guests can experience surfing, swimming, and investigating local shops and restaurants in Jacksonville FL.
Neptune Beach: Neptune Beach provides a typical Florida beach town feeling with its grainy beaches and easygoing vibe. People can partake in surfing, swimming, and exploring local shops and restaurants in Jacksonville FL.
Jacksonville Beach: Jacksonville Beach is a vibrant shoreline city known because of its sandy shores and surf scene. It provides a blend of recreational activities, dining, and nightlife along the Atlantic Ocean.
Huguenot Memorial Park: Huguenot Memorial Park provides a lovely beachfront location with chances for campgrounds, fishing, and birdwatching. Guests can enjoy the natural allure of the region with its diverse wildlife and scenic coastal views in Jacksonville FL.
Castaway Island Preserve: Castaway Island Preserve in Jacksonville FL, provides picturesque trails and boardwalks through diverse ecosystems. Visitors can enjoy walks in nature, birdwatching, and exploring the splendor of the coastal area.
Yellow Bluff Fort Historic State Park: Yellow Bluff Fort Historic State Park in Jacksonville FL safeguards the earthen remains of a Civil War Confederate fort. Guests can explore the historic site and learn regarding its significance through interpretive exhibits.
Mandarin Museum & Historical Society: The Mandarin Museum & Historical Society conserves the history of the Mandarin neighborhood in Jacksonville FL. Visitors are able to explore exhibits and artifacts that display the location's distinctive history.
Museum of Southern History: This Museum of Southern History exhibits relics and displays connected to the history and culture of the Southern United States. Guests are able to explore a range 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, provides guided walking tours to view rescued big cats and other exotic animals. It's a non-profit organization committed to providing a safe, caring, forever home for these animals.

Air Conditioning Installation: Right installation of cooling systems guarantees good and comfortable indoor climates. This critical process guarantees peak performance and longevity of climate control units.
Air Conditioner: ACs cool indoor spaces by removing heat and moisture. Proper setup by qualified technicians ensures effective operation and ideal climate control.
Hvac: Hvac systems govern temperature and air's condition. They are crucial for setting up climate control answers in structures.
Thermostat: A Thermostat is the control center for managing temperature in climate control systems. It tells the cooling unit to activate and deactivate, maintaining the desired indoor environment.
Refrigerant: Refrigerant is crucial for cooling systems, extracting heat to generate cold air. Proper management of refrigerants is essential during HVAC setup for efficient and secure operation.
Compressor: This Compressor is a vital heart of the cooling system, pressurizing 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 part is vital for efficient climate control system setup in buildings.
Condenser Coil: This Condenser Coil serves as an essential component in cooling systems, releasing heat outside. It aids the heat transfer needed for efficient indoor climate management.
Ductwork: Ductwork is essential for dispersing treated air around a building. Correct duct layout and installation are critical for effective climate regulation system positioning.
Ventilation: Efficient Ventilation is important for adequate airflow and indoor air quality. It plays a vital role in guaranteeing peak operation and efficiency of climate control equipment.
Heat Pump: Heat Pumps transfer heat, providing both heating and cooling. They're vital parts in contemporary climate control system setups, providing energy-efficient temperature regulation.
Split System: Split System provide both cooling and heating via an indoor unit connected to an outdoor compressor. They offer a ductless answer for temperature control in specific rooms or areas.
Central Air Conditioning: Central air conditioning systems chill entire homes from a single, powerful unit. Proper installation of these systems is vital for streamlined and functional home cooling.
Energy Efficiency Ratio: Energy Efficiency Ratio measures cooling effectiveness: higher Energy Efficiency Ratio shows improved operation and reduced energy consumption for climate control systems. Selecting a unit with a high Energy Efficiency Ratio can significantly reduce long-term costs when installing a new climate control system.
Variable Speed Compressor: Variable Speed Compressors change refrigeration output to match demand, boosting efficiency and comfort in HVAC systems. This exact adjustment decreases power waste and preserves uniform temperatures in indoor environments.
Compressor Maintenance: Maintaining compressors ensures efficient operation and lifespan in cooling systems. Ignoring it can lead to expensive repairs or system failures when establishing climate control.
Air Filter: Air Filter trap dirt and particles, ensuring pure air flow within HVAC systems. This improves system performance and indoor air condition throughout temperature regulation setup.
Installation Manual: The Installation Manual provides key direction for properly installing a cooling system. It ensures correct procedures are followed for optimal performance and safety during the unit's setup.
Electrical Wiring: Electrical Wiring is critical for supplying power to and controlling the components of climate control systems. Suitable wiring ensures secure and effective operation of the cooling and heating units.
Indoor Unit: Indoor Unit distributes treated air within a space. It's a critical part for climate control systems, making sure of correct temperature management in buildings.
Outdoor Unit: The Outdoor Unit contains the compressor and condenser, dissipating heat outside. It's crucial for a complete climate control system setup, ensuring effective cooling inside.
Maintenance: Routine upkeep ensures effective operation and lengthens the lifespan of climate control systems. Proper Maintenance averts breakdowns and optimizes the efficiency of installed cooling systems.
Energy Efficiency: Energy Efficiency is crucial for reducing energy consumption and expenses when setting up new climate control systems. Prioritizing effective equipment and suitable installation minimizes environmental effect and maximizes long-term savings.
Thermodynamics: Thermodynamics explains how heat transfers and transforms energy, crucial for cooling setup system. Effective climate control creation relies on thermodynamic principles to maximize energy use during setup location.
Building Codes: Building Codes ensure correct and safe HVAC system setup in buildings. They govern aspects such as energy efficiency and air flow for climate control systems.
Load Calculation: Load calculations establishes the warming and chilling requirements of a room. This is vital for selecting correctly sized HVAC units for efficient climate control.
Mini Split: Mini Split offer a no-duct approach to climate control, offering focused heating and cooling. The ease of placement renders them appropriate for spaces where adding ductwork for climate modification is unfeasible.
Air Handler: An Air Handler moves treated air throughout a building. It's a vital component for correct climate control system installation.
Insulation: Insulation is crucial for keeping efficient temperature control within a building. It reduces heat transfer, reducing the workload on cooling systems and optimizing temperature setups.
Drainage System: Drainage Systems remove moisture produced by cooling equipment. Proper drainage stops water damage and assures efficient operation of HVAC setups.
Filter: Strainers are critical parts that eliminate pollutants from the air during the setup of climate control systems. This guarantees purer air circulation and protects the system's internal parts.
Heating Ventilation And Air Conditioning: Heating Ventilation And Air Conditioning systems control inside climate by regulating temperature, humidity, and air condition. Proper setup of these systems guarantees economical and productive 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 design eases the process of setting up climate control in homes and businesses.
Hvac Technician: Hvac Technicians are skilled professionals who focus in the installation of climate control systems. They make certain of correct operation and efficiency of these systems for optimal indoor comfort.
Indoor Air Quality: The quality of indoor air substantially impacts comfort and health, so HVAC system setup should emphasize filtration and ventilation. Appropriate system design and setup is crucial for improving air quality.
Condensate Drain: The Condensate Drain eliminates water generated throughout the cooling process, preventing harm and maintaining system effectiveness. Correct drain setup is vital for successful climate control device and extended performance.
Variable Refrigerant Flow: Variable Refrigerant Flow (VRF) systems accurately control refrigerant amount to various zones, providing customized cooling and heating. The technology is essential for creating effective and adaptable climate control in building setups.
Building Automation System: Building automation systems orchestrate and streamline the operation of HVAC equipment. This leads to improved temperature regulation and power savings in buildings.
Air Conditioning: Heating, ventilation, and air conditioning systems control indoor temperature and atmosphere. Proper installation of these systems is key for efficient and effective climate control.
Temperature Control: Precise temperature regulation is essential for effective climate control system installation. It guarantees peak performance and comfort in new cooling systems.
Thermistor: Temperature-sensitive resistors are thermistors used in weather control systems to accurately measure air temperature. This data helps to control system operation, ensuring peak performance and energy efficiency in ecological control setups.
Thermocouple: Temperature sensors are devices essential for ensuring proper HVAC system setup. They correctly assess temperature, enabling precise adjustments and optimal climate control function.
Digital Thermostat: Digital Thermostats accurately control temperature, improving HVAC system operation. They are crucial for establishing home climate regulation systems, guaranteeing efficient and comfortable environments.
Programmable Thermostat: Programmable Thermostats improve climate control systems by enabling personalized temperature routines. This results in enhanced energy efficiency and comfort in residential AC setups.
Smart Thermostat: Smart thermostats improve home temperature management by understanding user desires and changing the temperature automatically. They play a key role in modern HVAC system configurations, enhancing energy efficiency and comfort.
Bimetallic Strip: A Bimetallic Strip, made up of two metals that have different expansion rates, curves in response to temperature variations. This characteristic is used in HVAC systems to control thermostats and regulate heating or cooling processes.
Capillary Tube Thermostat: A Capillary Tube Thermostat precisely controls temperature in cooling systems through remote sensing. This component is essential for maintaining desired climate control inside buildings.
Thermostatic Expansion Valve: The Thermostatic Expansion Valve controls refrigerant flow into the evaporator, keeping best cooling. This part is crucial for efficient operation of refrigeration and air conditioning systems in buildings.
Setpoint: Setpoint is the desired temperature a climate control system intends to reach. It directs the system's operation during climate control setups to maintain preferred comfort levels.
Temperature Sensor: Temperature Sensors are vital for adjusting warming, air flow, and air conditioning systems by tracking air temperature and assuring optimal climate control. Their data helps enhance system performance during climate control installation and maintenance.
Feedback Loop: A Feedback Loop aids with regulating temperature during climate control system setup by constantly monitoring and adjusting settings. This ensures optimal performance and energy efficiency of installed residential cooling.
Control System: Control Systems govern heat, humidity, and air circulation in environmental control setups. These systems ensure optimal well-being and energy efficiency in climate-controlled environments.
Thermal Equilibrium: Thermal Equilibrium is achieved when components attain the same temperature, essential for effective climate control system setup. Proper balance assures peak performance and energy conservation in set up cooling systems.
Thermal Conductivity: Thermal Conductivity dictates how efficiently materials move heat, affecting the cooling system setup. Choosing materials with suitable thermal properties assures peak performance of installed climate control systems.
Thermal Insulation: Thermal insulation minimizes heat transfer, making sure of 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 desired temperatures by fully turning on or deactivating cooling systems. This simple way is important for regulating temperature within buildings throughout environmental control system installation.
Pid Controller: PID Controllers precisely control temps in HVAC units. This ensures efficient temperature regulation during building temperature configuration and functioning.
Evaporator: This Evaporator takes in heat from within a space, cooling the air. This is a critical component in climate control systems created for home comfort.
Condenser: The Condenser unit is a critical component in cooling systems, dissipating heat removed from the indoor space to the external environment. Its accurate setup is essential for effective climate control system location and performance.
Chlorofluorocarbon: Chlorofluorocarbons have been once widely used refrigerants which helped with cooling in many building systems. Their part has decreased because of environmental concerns about ozone depletion.
Hydrofluorocarbon: Hydrofluorocarbon are coolants typically used in refrigeration systems for structures and cars. Their suitable management is crucial during the establishment of climate control systems to avoid environmental damage and ensure efficient operation.
Hydrochlorofluorocarbon: HCFCs were once widely used coolants in air conditioning systems for buildings. Their phase-out has resulted in the adoption of more environmentally friendly options for new HVAC installations.
Global Warming Potential: Global Warming Potential (GWP) shows how much a certain mass of greenhouse gas adds to global warming over a set period relative to carbon dioxide. Choosing refrigerants with lower GWP is crucial when setting up climate control systems to minimize 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 moving heat in climate control systems. Evaporation and condensation processes allow cooling by absorbing heat indoors and expelling it outdoors.
Heat Transfer: Heat Transfer principles are key for effective climate control system installation. Understanding conduction, convection, and radiation guarantees prime system functioning and energy efficiency during the course of establishing home cooling.
Refrigeration Cycle: The Refrigeration Cycle moves heat, enabling refrigeration in climate-control systems. Correct setup and maintenance make sure of effective performance and longevity of these refrigeration solutions.
Environmental Protection Agency: EPA regulates refrigerants and sets standards for HVAC system servicing to safeguard the ozone layer and lower greenhouse gas emissions. Technicians handling refrigeration equipment must be certified to ensure correct refrigerant management and stop environmental damage.
Leak Detection: Leak Detection makes certain the soundness of refrigerant lines after climate control system installation. Identifying and addressing leaks is essential for optimal performance and ecological safety of newly installed climate control systems.
Pressure Gauge: Pressure Gauge are vital tools for checking refrigerant levels during HVAC system setup. They guarantee optimal performance and prevent damage by verifying pressures are within certain ranges for proper cooling operation.
Expansion Valve: The Expansion Valve modulates refrigerant stream in cooling systems, allowing for efficient heat uptake. It's a key component for optimal performance in environmental control setups.
Cooling Capacity: Cooling capacity decides how well a system can lower the temperature of a room. Choosing the right level is important for optimal performance in placement of environmental control systems.
Refrigerant Recovery: Refrigerant Recovery is the procedure of taking out and storing refrigerants during HVAC system setups. Properly recovering refrigerants prevents environmental harm and guarantees effective new cooling equipment installations.
Refrigerant Recycling: Refrigerant Recycling recovers and reuses refrigerants, reducing environmental impact. This process is essential when setting up climate control systems, guaranteeing proper handling and preventing ozone depletion.
Safety Data Sheet: Safety Data Sheets (SDS) give vital information on the secure handling and potential hazards of chemicals utilized in cooling system setup. Technicians depend on SDS data to protect themselves and avoid accidents during HVAC equipment installation and connection.
Synthetic Refrigerant: Synthetic Refrigerants are vital fluids used in cooling systems to move heat. Their correct handling is key for effective climate control setup and maintenance.
Heat Exchange: Heat Exchange is essential for chilling buildings, permitting effective temperature control. It's a pivotal process in climate control system installation, facilitating the movement of heat to provide comfortable indoor environments.
Cooling Cycle: Cooling Cycle is the key process of heat extraction, utilizing refrigerant to absorb and release heat. This process is vital for efficient climate control system setup in buildings.
Scroll Compressor: Scroll compressors effectively compress refrigerant for cooling systems. They are a critical component for efficient temperature regulation in buildings.
Reciprocating Compressor: Piston pumps are crucial components that compress refrigerant in refrigeration systems. They aid heat exchange, allowing effective climate regulation within buildings .
Centrifugal Compressor: Centrifugal Compressors are critical parts that raise refrigerant pressure in big climate control systems. They efficiently move refrigerant, allowing efficient cooling and heating throughout extensive areas.
Rotary Compressor: Rotary Compressor are a vital component in cooling systems, employing a rotating mechanism to compress refrigerant. Their effectiveness and compact size make them perfect for climate control setups in various applications.
Compressor Motor: This Compressor Motor serves as the driving force behind the cooling process, circulating refrigerant. It is vital for proper climate control system installation and operation in buildings.
Compressor Oil: Compressor lubricant oils and protects moving parts inside a systems' compressor, ensuring efficient refrigerant compression for proper climate control. It is crucial to choose the correct type of oil throughout system installation to ensure longevity and optimal performance of the cooling appliance.
Pressure Switch: A Pressure Switch checks refrigerant amounts, making sure the system works safely. It prevents harm by shutting down the cooling device if pressure falls outside the acceptable spectrum.
Compressor Relay: A Compressor Relay is an electrical switch that controls the compressor motor in cooling setups. It ensures the compressor begins and ceases properly, allowing effective temperature control within climate control systems.
Suction Line: The Suction Line, a vital part in cooling systems, carries refrigerant vapor from the evaporator to the compressor. Proper sizing and insulation of the line is key for efficient system performance during climate control setup.
Discharge Line: The Discharge Line transports hot, high-pressure refrigerant gas from the compressor to the condenser. Proper dimensioning and setup of this discharge line are essential for optimal cooling system setup.
Compressor Capacity: Compressor Capacity dictates the cooling power of a system for indoor temperature control. Choosing the right size ensures effective temperature control during climate control setup.
Cooling Load: Cooling Load is the quantity of heat that needs to be removed from a area to maintain a desired temperature. Correct cooling load calculation is important for proper HVAC system installation and sizing.
Air Conditioning Repair: Air Conditioning Repair ensures systems function perfectly after they are installed. It's crucial for maintaining efficient climate control systems installed.
Refrigerant Leak: Refrigerant Leaks decrease cooling effectiveness and can result in equipment malfunction. Resolving these leakages is essential for proper climate control system setup, guaranteeing peak performance and durability.
Seer Rating: SEER score represents an HVAC system's cooling performance, affecting long-term energy expenses. Higher SEER values imply greater energy savings when setting up climate control.
Hspf Rating: HSPF Rating shows the heating efficiency of heat pumps. Higher ratings indicate better energy efficiency during climate control installation.
Preventative Maintenance: Preventative servicing makes sure HVAC systems operate effectively and dependably after installation. Routine maintenance reduces breakdowns and increases the lifespan of climate control setups.
Airflow: Airflow ensures effective cooling and heating spread across a building. Correct Airflow is vital for peak operation and comfort in climate control systems.
Electrical Components: Electrical Components are vital for powering and controlling systems that regulate indoor temperature. They guarantee suitable performance, safety, and effectiveness in temperature regulation systems.
Refrigerant Charging: Refrigerant Charging is the method of introducing the proper amount of refrigerant to a cooling system. This guarantees best operation and efficiency when setting up climate control units.
System Diagnosis: The System Diagnosis process pinpoints potential problems before, during, and after HVAC system setup. It ensures peak function and prevents future troubles in climate control setups.
Hvac System: HVAC systems control heat, moisture, and air quality in buildings. They are critical for establishing climate-control solutions in domestic and business spaces.
Ductless Air Conditioning: Ductless Air Conditioning provide targeted temperature control lacking extensive ductwork. They make easier temperature control installation in rooms that lack pre-existing duct systems.
Window Air Conditioner: Window air conditioners are self-contained devices placed in windows to chill individual spaces. They provide a straightforward method for localized temperature regulation inside a building.
Portable Air Conditioner: Portable AC units provide a flexible temperature-control answer for spaces without central systems. They can also offer temporary climate control during HVAC system configurations.
System Inspection: System Inspection ensures suitable installation of cooling systems by confirming part condition and compliance to installation standards. This procedure guarantees effective operation and prevents future malfunctions in climate control setups.
Coil Cleaning: Coil Cleaning ensures effective heat transfer, crucial for optimal system performance. This maintenance process is essential for proper setup of climate control systems.
Refrigerant Recharge: Refrigerant Recharge is vital for restoring chilling ability in climate control systems. It ensures peak performance and durability of newly set up climate control equipment.
Capacitor: These devices provide the necessary 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 is an electrical switch which controls power for the outdoor unit's components. It enables the cooling system to activate when needed.
Blower Motor: The Blower Motor moves air via the ductwork, enabling efficient heating and cooling distribution within a building. It is a key component for indoor climate control systems, ensuring stable temperature and airflow.
Overheating: Overheating can severely hamper the functionality of recently installed climate control systems. Technicians must fix this issue to ensure effective and dependable cooling operation.
Troubleshooting: Fixing identifies and fixes issues that arise during climate control system setup. Sound fixing guarantees best system performance and stops future issues during building cooling appliance installation.
Refrigerant Reclaiming: Refrigerant Reclaiming retrieves and reclaims used refrigerants. This procedure is crucial for eco-friendly climate control system establishment.
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: This Montreal Protocol eliminates ozone-depleting substances utilized in cooling systems. This change requires utilizing alternative refrigerants in new climate control setups.
Greenhouse Gas: Greenhouse gases trap warmth, impacting the power efficiency and environmental impact of weather control system setups. Selecting refrigerants with lower global warming potential is crucial for eco-friendly climate control execution.
Cfc: Chlorofluorocarbons were formerly critical refrigerants in cooling systems for structures and vehicles. Their use has been discontinued due to their detrimental impact on the ozone layer.
Hcfc: Hcfc were once common refrigerants utilized 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 frequently used refrigerants in cooling systems for buildings. Their correct handling is essential during the establishment of these systems to lessen environmental impact.
Refrigerant Oil: Refrigerant oil lubricates the compressor in cooling systems, assuring smooth operation and a long lifespan. It's vital for the correct operation of cooling setups.
Phase-Out: Phase-out refers to the gradual elimination of certain refrigerants with high global warming potential. This impacts the selection and maintenance of climate control systems in buildings.
Gwp: GWP indicates a refrigerant's ability to heat the planet if released. Lower GWP refrigerants are increasingly preferred in eco-friendly HVAC system configurations.
Odp: Odp refrigerants hurt the ozone layer, impacting regulations for refrigeration system installation. Installers must utilize ozone-friendly alternatives during HVAC equipment placement.
Ashrae: ASHRAE defines criteria and recommendations for HVAC system setup. These standards guarantee optimized and secure climate control system deployment in structures.
Hvac Systems: Hvac Systems offer temperature and air quality control for indoor settings. They are critical for setting up cooling systems in buildings.
Refrigerant Leaks: Refrigerant Leaks lower cooling system efficiency and may harm the environment. Appropriate procedures during climate control unit installation are essential to prevent these leaks and ensure optimal performance.
Hvac Repair Costs: Hvac Repair Costs can greatly influence decisions about switching to a new temperature system. Unexpected repair costs may prompt homeowners to put money in a full home cooling system for future savings.
Hvac Installation: Hvac Installation involves setting up heating, ventilation, and air conditioning units. It's essential for allowing effective climate control within structures.
Hvac Maintenance: Hvac Maintenance guarantees efficient performance and prolongs system life. Appropriate maintenance is crucial for seamless climate control system installations.
Hvac Troubleshooting: Hvac Troubleshooting identifies and resolves problems in heating, ventilation, and cooling systems. It guarantees peak performance during climate control unit setup and operation.
Zoning Systems: Zoning schemes divide a building into distinct areas for customized temperature regulation. This approach optimizes comfort and energy savings during HVAC setup.
Compressor Types: Various Compressor Types are critical components for effective climate control systems. Their selection greatly impacts system effectiveness and performance in environmental comfort uses.
Compressor Efficiency: Compressor Efficiency is vital, determining how efficiently the system cools a room for a given energy input. Improving this efficiency directly impacts cooling system setup costs and long-term operational expenses.
Compressor Overheating: Overheating Compressor can seriously damage the unit's core, leading to system malfunction. Proper setup ensures sufficient air flow and refrigerant levels, avoiding this issue in climate control system placements.
Compressor Failure: Compressor malfunction stops the refrigeration process, needing expert attention during climate control system installations. A defective compressor compromises the entire system's performance and longevity when integrating it into a building.
Overload Protector: An Overload Protector protects the compressor motor from getting too hot during climate control system setup. It stops harm by automatically disconnecting power when too much current or temperature is detected.
Fan Motor: Fan Motor circulate air across evaporator and condenser coils, a critical process for efficient climate control system setup. They facilitate heat exchange, ensuring peak cooling and heating operation within the designated space.
Refrigerant Lines: Refrigerant Lines are critical parts that join the inside and outside units, moving refrigerant to facilitate cooling. Their correct installation is essential for efficient and productive climate control system installation.
Condensing Unit: A Condensing Unit is the outside part in a cooling system. The unit rejects heat from the refrigerant, enabling indoor temperature control.
Heat Rejection: Heat Rejection is essential for cooling systems to efficiently eliminate excess heat from a cooled area. Correct Heat Rejection assures optimal performance and longevity of climate control systems.
System Efficiency: System Efficiency is vital for minimizing energy use and operational costs. Improving performance during climate control setup guarantees long-term savings and environmental advantages.
Pressure Drop: Pressure Drop is the reduction in fluid pressure as it flows through a setup, impacting airflow in climate control setups. Properly managing Pressure Drop is vital for peak performance and efficiency in environmental comfort systems.
Subcooling: Subcooling guarantees optimal system operation by cooling the refrigerant under its condensing temperature. This action avoids flash gas, increasing refrigeration capacity and efficiency throughout HVAC system installation.
Superheat: Superheat ensures that only vapor refrigerant goes into the compressor, preventing damage. It's crucial to measure superheat during HVAC system installation to maximize cooling capabilities and efficiency.
Refrigerant Charge: Refrigerant Charge is the quantity of refrigerant in a system, essential for peak cooling performance. Proper charging assures effective heat exchange and avoids damage during climate control setup.
Corrosion: Rust impairs metallic parts, potentially leading to leaks and system failures. Protecting against Corrosion is essential for maintaining the effectiveness and lifespan of climate control systems.
Fins: Fins boost the area of coils, increasing heat transfer effectiveness. This is crucial for peak performance in environmental control system configurations.
Copper Tubing: Copper Tubing is essential for refrigerant transport in HVAC systems because of its long-lasting nature and efficient heat transfer. Its reliable connections assure correct system function during setup of thermostat units.
Aluminum Tubing: Aluminum Tubing is vital for transferring refrigerant in climate control systems. Their light and corrosion-resistant properties make it perfect for connecting internal and external units in HVAC installations.
Repair Costs: Unforeseen maintenance can greatly 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 and Air 8400 Baymeadows Way Suite 1, Jacksonville, FL 32256 +19043791648Bold City Heating and Air 8400 Baymeadows Way Suite 1, Jacksonville, FL 32256 +19043791648Bold City Heating and Air 8400 Baymeadows Way Suite 1, Jacksonville, FL 32256 +19043791648Bold City Heating and Air 8400 Baymeadows Way Suite 1, Jacksonville, FL 32256 +19043791648Bold City Heating and Air 8400 Baymeadows Way Suite 1, Jacksonville, FL 32256 +19043791648Bold City Heating and Air 8400 Baymeadows Way Suite 1, Jacksonville, FL 32256 +19043791648Bold City Heating and Air 8400 Baymeadows Way Suite 1, Jacksonville, FL 32256 +19043791648Bold City Heating and Air 8400 Baymeadows Way Suite 1, Jacksonville, FL 32256 +19043791648Bold City Heating and Air 8400 Baymeadows Way Suite 1, Jacksonville, FL 32256 +19043791648Bold City Heating and Air 8400 Baymeadows Way Suite 1, Jacksonville, FL 32256 +19043791648Bold City Heating and Air 8400 Baymeadows Way Suite 1, Jacksonville, FL 32256 +19043791648Bold City Heating and Air 8400 Baymeadows Way Suite 1, Jacksonville, FL 32256 +19043791648Bold City Heating and Air 8400 Baymeadows Way Suite 1, Jacksonville, FL 32256 +19043791648Bold City Heating and Air 8400 Baymeadows Way Suite 1, Jacksonville, FL 32256 +19043791648Bold City Heating and Air 8400 Baymeadows Way Suite 1, Jacksonville, FL 32256 +19043791648Bold City Heating and Air 8400 Baymeadows Way Suite 1, Jacksonville, FL 32256 +19043791648Bold City Heating and Air 8400 Baymeadows Way Suite 1, Jacksonville, FL 32256 +19043791648Bold City Heating and Air 8400 Baymeadows Way Suite 1, Jacksonville, FL 32256 +19043791648Bold City Heating and Air 8400 Baymeadows Way Suite 1, Jacksonville, FL 32256 +19043791648

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

3 days ago

Updates from customers

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

a year ago

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Why would an AC heater not be turning on?

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

6 months ago

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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

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

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.

Response from the owner a month ago

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

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Bold City Heating & Air

HVAC & Air Conditioning Repair in Jacksonville, FL

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

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

Summer HVAC Tune Up for Just $89

Get your system ready for the heat!

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

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!

We Believe In:

Clear Upfront Pricing

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High-Level Workmanship

Trusted Heating and Air Pros in Jacksonville

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

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Number One For Heating & Cooling

Keeping you comfortable is our top priority!

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

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

Jacksonville Grown. Family Owned & Operated.

See What Our Customers Are Saying About Us!

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

Paul G.

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

John L.

Paul G.

John L.

Paul G.

An HVAC Team You Can Trust

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

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

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

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Bold City Heating & Air ✔️

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Air conditioning

From Wikipedia, the free encyclopedia

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

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

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

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

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

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

History

[edit]

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

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

An array of air conditioner condenser units outside a commercial office building

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

Development

[edit]

Preceding discoveries

[edit]

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

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

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

First devices

[edit]

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

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

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

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

Further development

[edit]

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

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

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

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

Operation

[edit]

Operating principles

[edit]

Main article: Vapor-compression refrigeration

A simple stylized diagram of the refrigeration cycle: 1) condensing coil, 2) expansion valve, 3) evaporator coil, 4) compressor

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

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

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

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

Heating

[edit]

Main article: Heat pump

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

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

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

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

Performance

[edit]

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

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

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

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

Control system

[edit]

Wireless remote control

[edit]

Main articles: Remote control and Infrared blaster

A wireless remote controller

The infrared transmitting LED on the remote

The infrared receiver on the air conditioner

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

Wired controller

[edit]

Main article: Thermostat

Several wired controllers (Indonesia, 2024)

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

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

Types

[edit]

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

* where the typical capacity is in kilowatt as follows:

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

Mini-split and multi-split systems

[edit]

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

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

Ducted central systems

[edit]

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

Central plant cooling

[edit]

Portable units

[edit]

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

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

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

Window unit and packaged terminal

[edit]

Main article: Packaged terminal air conditioner

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

Packaged air conditioner

[edit]

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

Types of compressors

[edit]

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

Reciprocating

[edit]

Main article: Reciprocating compressor

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

Scroll

[edit]

Main article: Scroll compressor

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

Screw

[edit]

Main article: Rotary-screw compressor

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

Capacity modulation technologies

[edit]

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

Hot gas bypass

[edit]

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

Manifold configurations

[edit]

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

Mechanically modulated compressor

[edit]

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

Variable-speed compressor

[edit]

Main article: Inverter compressor

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

Impact

[edit]

Health effects

[edit]

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

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

Economic effects

[edit]

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

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

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

Environmental effects

[edit]

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

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

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

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

Social effects

[edit]

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

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

Other techniques

[edit]

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

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

Passive ventilation

[edit]

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

The ventilation system of a regular earthship

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

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

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

Passive cooling

[edit]

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

A traditional Iranian solar cooling design using a wind tower

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]

A pair of short windcatchers (*malqaf*) used in traditional architecture; wind is forced down on the windward side and leaves on the leeward side (*cross-ventilation*). In the absence of wind, the circulation can be driven with evaporative cooling in the inlet (which is also designed to catch dust). In the center, a *shuksheika* (roof lantern vent), used to shade the qa'a below while allowing hot air rise out of it (*stack effect*).^[11]

Daytime radiative cooling

[edit]

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

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

Fans

[edit]

Main article: Ceiling fan

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

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

Thermal buffering

[edit]

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

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

Evaporative cooling

[edit]

Main article: Evaporative cooler

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

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

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