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  2. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    A heat pump is a compressor that cycles hot or cold air. It is a device that is designed to move thermal energy in the opposite direction of heat flow by absorbing heat from a cold space which is released to a warmer space. heat transfer Heat transfer happens when heat moves from one area to another.

  3. Air source heat pump - Wikipedia

    en.wikipedia.org/wiki/Air_source_heat_pump

    An air-to air system can be designed to transfer heat in either direction, to heat or cool the interior of the building in winter and summer respectively. Internal ducting may be used to distribute the air. [8] An air-to-water system only pumps heat inwards, and can provide space heating and hot water. [9]

  4. Air purifier - Wikipedia

    en.wikipedia.org/wiki/Air_purifier

    The commercially graded air purifiers are manufactured as either small stand-alone units or larger units that can be affixed to an air handler unit (AHU) or to an HVAC unit found in the medical, industrial, and commercial industries. Air purifiers may also be used in industry to remove impurities from air before processing.

  5. Heating, ventilation, and air conditioning - Wikipedia

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

    Most modern hot water boiler heating systems have a circulator, which is a pump, to move hot water through the distribution system (as opposed to older gravity-fed systems). The heat can be transferred to the surrounding air using radiators, hot water coils (hydro-air), or other heat exchangers. The radiators may be mounted on walls or ...

  6. Vapor-compression refrigeration - Wikipedia

    en.wikipedia.org/wiki/Vapor-compression...

    A representative pressure–volume diagram for a refrigeration cycle. Vapour-compression refrigeration or vapor-compression refrigeration system (VCRS), [1] in which the refrigerant undergoes phase changes, is one of the many refrigeration cycles and is the most widely used method for air conditioning of buildings and automobiles.

  7. RS Recommends: These Cooling Air Purifiers Do Double Duty to ...

    www.aol.com/entertainment/rs-recommends-cooling...

    But even if you’ve got AC, these cooling air purifiers are a welcome bonus, circulating clean air throughout the house and even showing you ratings and analyses of ind

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