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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. Is It Time for a Furnace Upgrade? 10 Warning Signs to ... - AOL

    www.aol.com/time-furnace-upgrade-10-warning...

    Typically, HVAC repair techs will let you know the current condition of the furnace, which can help decide when the furnace will need to be replaced. They should also be able to provide a basic ...

  4. Freeze stat - Wikipedia

    en.wikipedia.org/wiki/Freeze_stat

    In practical situations, when an air coil freeze stat is not used, bypassed, or defeated, the air coil can freeze, and this causes a lack of air flow to the facility. [3] By contrast, when a water coil freeze stat is not used, the water coil can get so cold that it can freeze the cooling liquid in the exchanger and burst the exchanger. [ 5 ]

  5. 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]

  6. What's the best temperature to set your air conditioner ... - AOL

    www.aol.com/whats-best-temperature-set-air...

    Try these tips to chill during Ohio's heat wave and keep your air conditioner running efficiently.

  7. Thermostat - Wikipedia

    en.wikipedia.org/wiki/Thermostat

    A pneumatic thermostat is a thermostat that controls a heating or cooling system via a series of air-filled control tubes. This "control air" system responds to the pressure changes (due to temperature) in the control tube to activate heating or cooling when required.

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