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  2. Air handler - Wikipedia

    en.wikipedia.org/wiki/Air_handler

    Air flow control (CAV or VAV air handlers) Zone control (single zone or multi zone air handlers) Fan location (draw-through or blow-through) Direction of outlet air flow (front, up, or down) Package model (horizontal or vertical) But, the first method is very usual in HVAC market. In fact, most of the company advertise their products by air ...

  3. Sound attenuator - Wikipedia

    en.wikipedia.org/wiki/Sound_attenuator

    A sound attenuator, or duct silencer, sound trap, or muffler, is a noise control acoustical treatment of Heating Ventilating and Air-Conditioning (HVAC) ductwork designed to reduce transmission of noise through the ductwork, either from equipment into occupied spaces in a building, or between occupied spaces.

  4. 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 ...

  5. Heating, ventilation, and air conditioning - Wikipedia

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

    The control circuit in a household HVAC installation. The wires connecting to the blue terminal block on the upper-right of the board lead to the thermostat. The fan enclosure is directly behind the board, and the filters can be seen at the top. The safety interlock switch is at the bottom left.

  6. Lou Carnesecca, legendary St. John's basketball coach, dies at 99

    www.aol.com/lou-carnesecca-longtime-st-johns...

    NEW YORK — Lou Carnesecca, the legendary St. John's basketball coach and New York sports icon, has died at age 99. Carnesecca was beloved and turned St. John's basketball into a national ...

  7. Uncommon Signs of Diabetes Doctors Want You to Know - AOL

    www.aol.com/uncommon-signs-diabetes-doctors-want...

    Endocrinologists share uncommon symptoms of diabetes that may indicate type 1, type 2, or prediabetes. Some signs include infections and dry skin.

  8. 'Volatile conditions' prompt red flag warnings across ...

    www.aol.com/volatile-conditions-prompt-red-flag...

    A month after a devastating blaze in Southern California, red flag warnings have been issued across Los Angeles and parts of the region Monday as strong wind gusts could potentially cause ...

  9. Variable air volume - Wikipedia

    en.wikipedia.org/wiki/Variable_air_volume

    Control of the system's fan capacity is critical in VAV systems. Without proper and rapid flow rate control, the system's ductwork, or its sealing, can easily be damaged by overpressurization. In the cooling mode of operation, as the temperature in the space is satisfied, a VAV box closes to limit the flow of cool air into the space.

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