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  2. Reversing valve - Wikipedia

    en.wikipedia.org/wiki/Reversing_valve

    A reversing valve removed from an HVAC heat pump for replacement. A reversing valve is a type of valve and is a component in a heat pump, that changes the direction of refrigerant flow. By reversing the flow of refrigerant, the heat pump refrigeration cycle is changed from cooling to heating or vice versa. This allows a residence or facility to ...

  3. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    [2] [3] Air conditioning is a member of a family of systems and techniques that provide heating, ventilation, and air conditioning (HVAC). [4] Heat pumps are similar in many ways to air conditioners, but use a reversing valve to allow them both to heat and to cool an enclosed space. [5]

  4. Reliance Home Comfort - Wikipedia

    en.wikipedia.org/wiki/Reliance_Home_Comfort

    In addition to water heater rentals (and sales in some areas), Reliance sells, rents, installs, and maintains furnaces and air conditioners. [1] It also offers maintenance and repair plans for heating and cooling systems, as well as for plumbing and electrical systems. [16]

  5. Backflow prevention device - Wikipedia

    en.wikipedia.org/wiki/Backflow_prevention_device

    Backflow prevention device. The simplest, most reliable way to provide backflow prevention is to provide an air gap.An air gap is simply an open vertical space between any device that connects to a plumbing system (like a valve or faucet) and any place where contaminated water can collect or pool.

  6. Rheem Manufacturing Company - Wikipedia

    en.wikipedia.org/wiki/Rheem_Manufacturing_Company

    Also in the same year, Rheem and Ruud central air conditioners were reported to have the fewest percentage of units requiring repair among all major HVAC brands according to Consumer Reports. [23] Rheem's market share of the central air conditioner market had been as high as 16% in the 1980s and dropped to about 11% by 2000. [24]

  7. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    A safety valve allows water to escape from the system when pressure becomes too high, and a valve can open to replenish water from the normal water supply if the pressure drops too low. Sealed systems offer an alternative to open-vent systems, in which steam can escape from the system, and gets replaced from the building's water supply via a ...

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