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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. Heater core - Wikipedia

    en.wikipedia.org/wiki/Heater_core

    Control valves may also clog or get stuck. Where a blend door is used instead of a control valve as a method of controlling the air's heating amount, the door itself or its control mechanism can become stuck due to thermal expansion. If the climate control unit is automatic, actuators can also fail.

  4. 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 ...

  5. Damper (flow) - Wikipedia

    en.wikipedia.org/wiki/Damper_(flow)

    A damper is a valve or plate that stops or regulates the flow of air inside a duct, chimney, VAV box, air handler, or other air-handling equipment. A damper may be used to cut off central air conditioning (heating or cooling) to an unused room, or to regulate it for room-by-room temperature and climate control - for example, in the case of ...

  6. BELIMO Holding AG - Wikipedia

    en.wikipedia.org/wiki/BELIMO_Holding_AG

    The company develops, produces and markets actuators for controlling heating, ventilation and air conditioning systems. Actuators and control valves make up the company's core business, and it is considered a global leader in motor control for HVAC. [4] Newer products have integrated sensors and control electronics using ASICs.

  7. 'Act of intimidation': Education Dept. suspends officials ...

    www.aol.com/education-department-places-dozens...

    The federal Education Department placed at least 60 employees on administrative leave late Friday night after Donald Trump's DEI executive order.

  8. Heating, ventilation, and air conditioning - Wikipedia

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

    An air conditioning system, or a standalone air conditioner, provides cooling and/or humidity control for all or part of a building. Air conditioned buildings often have sealed windows, because open windows would work against the system intended to maintain constant indoor air conditions.

  9. Who's participating in the presidential parade? What to know ...

    www.aol.com/whos-participating-presidential...

    U.S. Air Force . Pipes & Drums of the Blue & Gold - Holly, New Jersey. Mobile Azalea Trail Maids - Mobile, Alabama. The Citadel Regimental Band and Pipes, & Summerall Guards - Charleston, South ...

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