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  2. 5 Signs That It's Time to Turn on the Heat for Winter ... - AOL

    www.aol.com/5-signs-time-turn-heat-203320559.html

    The time of year you switch from air conditioning to heat is important for the longevity ... it's a clear sign your air conditioning isn’t cutting it anymore," Gabrielli says. 3. Floors Feel ...

  3. 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 ...

  4. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    Air conditioning, often abbreviated as A/C (US) or air con (UK), [1] is the process of removing heat from an enclosed space to achieve a more comfortable interior temperature (sometimes referred to as 'comfort cooling') and in some cases also strictly controlling the humidity of internal air.

  5. Friedrich Air Conditioning - Wikipedia

    en.wikipedia.org/wiki/Friedrich_Air_Conditioning

    They are not to be confused with the tall Slider/Casement series produced by White Consolidated Industries (and later LG) for Friedrich. Portable/Power Miser: Introduced in 1965 and produced until the early 1990s, this was the first room air conditioner advertised as a portable unit by Friedrich. In 1974, the name Power Miser appeared along ...

  6. Heat pump and refrigeration cycle - Wikipedia

    en.wikipedia.org/wiki/Heat_pump_and...

    Thermodynamic heat pump cycles or refrigeration cycles are the conceptual and mathematical models for heat pump, air conditioning and refrigeration systems. [1] A heat pump is a mechanical system that transmits heat from one location (the "source") at a certain temperature to another location (the "sink" or "heat sink") at a higher temperature. [2]

  7. Can cold weather make you sick? Your grandma wasn't entirely ...

    www.aol.com/news/cold-weather-sick-grandma-wasnt...

    If the air is cooler and drier, droplets stay in the air longer, which increases the chances of infecting people nearby. This includes with air conditioning, which can reduce humidity.

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