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  2. Register (air and heating) - Wikipedia

    en.wikipedia.org/wiki/Register_(air_and_heating)

    During winter months, for example, an air conditioning register can be closed to prevent cold air from being pulled from the room. This allows the hot air to mix more completely with the cold air in the room, improving the efficiency of the HVAC system. [7] (The return should be efficient enough to draw off the cooler air.) [10] [11]

  3. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    An air conditioner designed for an occupied space will typically achieve a 30% to 60% relative humidity in the occupied space. [51] Most modern air-conditioning systems feature a dehumidification cycle during which the compressor runs. At the same time, the fan is slowed to reduce the evaporator temperature and condense more water.

  4. Air conditioned clothing - Wikipedia

    en.wikipedia.org/wiki/Air_conditioned_clothing

    One advantage of air-cooled clothing is that it requires much less energy to cool people down than to cool down their entire environment. For instance, an air cooled shirt uses 4,400 mAh of power for 8.5 hours on the fastest fan setting, while an average central air conditioning unit uses 3000 to 5000 watts of power [citation needed].

  5. Fan (machine) - Wikipedia

    en.wikipedia.org/wiki/Fan_(machine)

    Window and central air conditioning in the 1960s caused many companies to discontinue production of fans, [12] but in the mid-1970s, with an increasing awareness of the cost of electricity and the amount of energy used to heat and cool homes, turn-of-the-century styled ceiling fans became popular again as both decorative and energy-efficient.

  6. Passive ventilation - Wikipedia

    en.wikipedia.org/wiki/Passive_ventilation

    Does not rely on wind: can take place on still, hot summer days when it is most needed. Stable air flow (compared to wind) Greater control in choosing areas of air intake; Sustainable method; Limitations of buoyancy-driven ventilation: Lower magnitude compared to wind ventilation on the windiest days; Relies on temperature differences (inside ...

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