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  2. Condensate pump - Wikipedia

    en.wikipedia.org/wiki/Condensate_pump

    Condensate pumps usually run intermittently and have a tank in which condensate can accumulate. Eventually, the accumulating liquid raises a float switch energizing the pump. The pump then runs until the level of liquid in the tank is substantially lowered. Some pumps contain a two-stage switch.

  3. Demand controlled ventilation - Wikipedia

    en.wikipedia.org/wiki/Demand_controlled_ventilation

    Although CAV systems cannot modulate airflow, researchers have experimented with running CAV system equipment intermittently to reduce energy consumption. [1] In this proposed system, the HVAC equipment is to run continuously when the space is occupied, then cycle on and off to maintain indoor air quality during inoccupancy. [1]

  4. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    This "subsystem" is vital to the performance and basic operation of the overall HVAC system. The DDC system is the "brain" of the HVAC system. It dictates the position of every damper and valve in a system. It determines which fans, pumps, and chiller run and at what speed or capacity.

  5. Heating, ventilation, and air conditioning - Wikipedia

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

    Such a system contains a boiler, furnace, or heat pump to heat water, steam, or air in a central location such as a furnace room in a home, or a mechanical room in a large building. The heat can be transferred by convection, conduction, or radiation. Space heaters are used to heat single rooms and only consist of a single unit.

  6. Motor capacitor - Wikipedia

    en.wikipedia.org/wiki/Motor_capacitor

    [citation needed] There are two common types of motor capacitors, start capacitor and run capacitor (including a dual run capacitor). [ 2 ] Motor capacitors are used with single-phase electric motors [ 3 ] : 11 that are in turn used to drive air conditioners , hot tub / jacuzzi spa pumps, powered gates, large fans or forced-air heat furnaces ...

  7. Affinity laws - Wikipedia

    en.wikipedia.org/wiki/Affinity_laws

    The affinity laws (also known as the "Fan Laws" or "Pump Laws") for pumps/fans are used in hydraulics, hydronics and/or HVAC to express the relationship between variables involved in pump or fan performance (such as head, volumetric flow rate, shaft speed) and power. They apply to pumps, fans, and hydraulic turbines. In these rotary implements ...

  8. Furnace (central heating) - Wikipedia

    en.wikipedia.org/wiki/Furnace_(central_heating)

    A condensing gas furnace includes a sealed combustion area, combustion draft inducer and a secondary heat exchanger. The primary gain in efficiency for a condensing gas furnace, as compared to a mid-efficiency forced-air or forced-draft furnace, is the capture of latent heat from the exhaust gases in the secondary heat exchanger.

  9. Forced-air - Wikipedia

    en.wikipedia.org/wiki/Forced-air

    Heat is produced via combustion of fuel. A heat exchanger keeps the combustion byproducts from entering the air stream. A ribbon style (long with holes), inshot (torch-like), or oil type burner is located in the heat exchanger.

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