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Heating, ventilation, and air conditioning (HVAC) is the use of various technologies to control the temperature, humidity, and purity of the air in an enclosed space. Its goal is to provide thermal comfort and acceptable indoor air quality .
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]
The temperature and humidity of air inside and outside the building are used in enthalpy calculations to determine when outside air can be used for free heating or cooling. Abbreviated OAT. packaged terminal air conditioner An air conditioner and heater combined into a single, electrically powered unit, typically installed through a wall and ...
The rating, developed by the American Society of Heating, Refrigerating and Air Conditioning Engineers, reports a filter’s ability to capture larger participles between 0.3 and 10 microns.
7. Layer on the clothes. “Layering is critical,” Smith said. “Even thin layers added together to increase one’s ability to retain heat … focus on keeping the torso warm. Often an extra ...
HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be taken (e.g. start the ...
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