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  2. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    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 ...

  3. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    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.

  4. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    Central, "all-air" air-conditioning systems (or package systems) with a combined outdoor condenser/evaporator unit are often installed in North American residences, offices, and public buildings, but are difficult to retrofit (install in a building that was not designed to receive it) because of the bulky air ducts required. [32] (Minisplit ...

  5. Reversing valve - Wikipedia

    en.wikipedia.org/wiki/Reversing_valve

    Reversing valves are built into the heat pump by the manufacturer, and must be replaced by an HVAC technician if they fail. Since the valve is an integral part of the sealed refrigerant circuit, proper procedures for recovering and then later refilling the refrigerant must be followed, to prevent its loss into the atmosphere.

  6. District cooling - Wikipedia

    en.wikipedia.org/wiki/District_cooling

    The district cooling plant is operated by SP Group's subsidiary, Singapore District Cooling. [17] A second district cooling plant was commissioned in May 2010, [17] which will supply chilled water for the air-conditioning of buildings in the area through pipes housed within the Common Services Tunnel in Marina Bay. The second district cooling ...

  7. Is your air conditioner making you sick? Experts unpack 'air ...

    www.aol.com/lifestyle/air-conditioner-making...

    The cool air from AC units helps balance a room’s humidity to prevent mold growth from happening. Sometimes, mold can be kept dormant for years until wet, damp conditions allow it to begin to ...