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  2. Johnson Controls - Wikipedia

    en.wikipedia.org/wiki/Johnson_Controls

    The York brand has been owned since August 2005 by Johnson Controls, when it was sold to them for $3.2 billion. [75] [76] At the time of the acquisition, it was the world's largest independent manufacturer of air conditioning, heating, and refrigeration machinery. Its stock symbol was formerly YRK.

  3. 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 ...

  4. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    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.

  5. Thermal expansion valve - Wikipedia

    en.wikipedia.org/wiki/Thermal_expansion_valve

    A thermal expansion valve is a key element to a heat pump; this is the cycle that makes air conditioning, or air cooling, possible. A basic refrigeration cycle consists of four major elements: a compressor, a condenser, a metering device and an evaporator. As a refrigerant passes through a circuit containing these four elements, air ...

  6. Daikin Applied Americas - Wikipedia

    en.wikipedia.org/wiki/Daikin_Applied_Americas

    1932 - Hermetic Compressor; 1951 – Packaged Terminal Air Conditioner (PTAC) 1962 - Packaged R-12 Positive Pressure Centrifugal Compressor Chiller; 1971 - Dual Centrifugal Compressor Chiller; 1988 - Chillers using HFC Refrigerants; 1990 - Open Protocol™ Feature as a link Between Unit Controller and Building Automation System using open ...

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