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Air Conditioning (also known as aircon, AC or A/C) is the process of altering the properties of air (primarily temperature and humidity) to more favorable conditions, typically with the aim of distributing the conditioned air to an occupied space to improve comfort. In the most general sense, air conditioning can refer to any form of technology, heating, cooling, de-humidification, humidification, cleaning, ventilation, or air movement that modifies the condition of air.

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Air Handler (also known as indoor unit or evaporator) is a device that blows the cooled air to various rooms in the house. See evaporator for more details.

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Central Air Conditioner (also referred to as ducted air conditioning, conventional air conditioning or traditional air conditioning) offers whole-house or large space cooling. It is comprised of an outdoor unit that houses a compressor and a condenser with a coil and a fan / fan motor assembly, and an indoor evaporator coil typically found near the furnace and/or an air handler. Refrigerant lines connect the outdoor unit to the indoor coil. Central air conditioners provide cooled air by removing heat from inside and releasing it outside. To accomplish this, the outdoor unit compressor pumps cooled refrigerant to the indoor evaporator, which releases cooled air. The air handler blows the cooled air through the ductwork to various rooms in the house. Refrigerant will carry heat from the air back to the outdoor compressor unit, and the cycle continues until a thermostat detects that the predetermined temperature has been reached. In winter seasons, generally a gas furnace will heat the air blown through the ductwork; the outdoor compressor unit does not operate.

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Compressor is a mechanical pump which is located within the condensing unit (outdoor unit) and driven by an electrical motor that circulates the refrigerant in the system under pressure to concentrate the heat it contains.

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Condenser (also referred to as condenser coil or outdoor unit) is a device in the outdoor unit the removes heat from the refrigerant, allowing the refrigerant to be converted from vapor to liquid.

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Conduit (or compact conduit) is a pipe or tube through which something (such as water or wire) passes.

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Controller (also referred to as control unit or remote control) is a central, sometimes distributed but clearly distinguishable, part of a mechanism that controls its operation.

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Duct-Free Split System (also known as split, ductless, ductless mini split, or mini splits) is simply a reconfiguration of a central air conditioner, consisting of an outdoor inverter-driven compressor / condenser unit, one or more indoor evaporator units, and a compact conduit for refrigerant piping and wiring. Instead of using one indoor evaporator coil / air handler to move cooled or heated air through ductwork as central air conditioners do, the indoor units are installed directly in each room or zone. Because the indoor units deliver conditioned air directly into the room, the need for complicated ductwork is removed, and energy losses from air traveling through ductwork are reduced. And because each indoor unit has its own thermostat and/or controller, temperatures can be customized for each room or zone.

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Ducted System (see also central air conditioner) provides air conditioning all year throughout the entire house. With a ducted system, the outdoor unit is connected to an indoor fan coil unit which is usually located in the ceiling or under the floor with flexible ductwork distributing warm or cool air through vents located in each room of the house.

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Evaporator (also referred to as evaporator coil or indoor unit) is used in an air conditioning system (in the indoor unit) to allow a compressed cooling chemical, such as R-22 (aka Freon) or R-410A), to evaporate from liquid to gas while absorbing heat in the process. The evaporator is typically found near the furnace and/or air handler.

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GoldFinTM Technology is an anti-corrosive treatment used on the surface of outdoor heat exchangers. This treatment is designed to protect air conditioners from pollution and corrosive conditions. It also improves their durability and longevity. This technology combats extreme outdoor conditions.

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Heat Pump (also referred to as Reverse Cycle Air Conditioner) is simply a central air conditioner with heat pump functionality where the refrigeration cycle can be reversed in cold weather. This type of air conditioner is significantly more energy efficient than electric resistance heating. 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. Heat pumps are more popular in milder winter climates because they become inefficient in more extreme cold due to ice forming on the outdoor unit 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 being the condenser coil, so that it can heat up and defrost.

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HVAC (heating, ventilation and air conditioning) is the technology of indoor and vehicular environmental comfort. Refrigeration is sometimes added to the field’s abbreviation as HVAC&R or HVACR, or ventilating is dropped as in HACR.

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Indoor Unit (also referred to as evaporator or air handler or IDU) of an air conditioning system typically contains an evaporator or evaporator coil and referred to as an air handler. See evaporator and air handler for more details.

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Outdoor Unit (also referred to as ODU) of an air conditioning system houses a compressor and a condenser with a coil and a fan / fan motor assembly.

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Inverter-Driven Compressor is housed in the outdoor unit and allows the air-conditioning system to ramp up or down to maintain comfort levels. After the set temperature is reached, the inverter-driven compressor and smart electronics allow the system to "coast," using only the minimum amount of energy to ensure that the room stays comfortable. Think of it as driving your car downhill with your foot off the accelerator--the car is maintaining speed but is not using gas. The inverter-driven compressor allows duct-free split systems to operate quietly, and without the surge-on and drop off energy cycles of conventional air conditioners which saves energy.

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Multi-Split System (also referred to as multi-zone) can air condition up to 9 rooms using only one outdoor unit and allows for individual temperature control in each room. This system is ideal for situations where there is limited space for outdoor units or insufficient ceiling or floor space for ducting.

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NATE (North American Technician Excellence) is a nationally recognized, nonprofit program supported by contractors, HVAC system manufacturers, and trade associations. To obtain certification, individual contractors take tests on various HVAC topics that validate their knowledge. Contractors may earn installation and service certification in different specialty areas. Companies that employ NATE-certified technician may display the NATE logo on their advertising, but when you call for an appointment, request that a NATE-certified contractor is sent to your home.

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SEER (Seasonal Energy Efficiency Ratio) is the industry-wide rating measurement that conveys energy consumption information to consumers. The higher the SEER, the more efficient the product as it requires less electricity to do its job.

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Split System consists of an indoor unit connected to an outdoor unit by small copper pipes and wiring ideal for air conditioning one room or an area of a home.

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Thermostat is a component of a control system which senses the temperature of a room/space/zone so that the system's temperature is maintained near a desired setpoint. The thermostat does this by switching heating or cooling devices on or off, or regulating the flow of a heat transfer fluid as needed, to maintain the correct temperature. The name is derived from the Greek words thermos "hot" and statos "a standing". A thermostat may be a control unit for a heating or cooling system or a component part of a heater or air conditioner. Thermostats can be constructed in many ways and may use a variety of sensors to measure the temperature. The output of the sensor then controls the heating or cooling apparatus.

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Window Wall Unit will air condition one room or an area of your home. They can be installed into windows or wall.