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  2. Automotive air conditioning - Wikipedia

    en.wikipedia.org/wiki/Automotive_air_conditioning

    The air conditioner quickly becomes a dirt and germ spinner. Merely replacing the air filter of an HVAC system as part of the inspection is not enough. The pollen filter box must be cleaned professionally and the air conditioning system evaporator must be flushed hygienically and effectively with cleaners without fragrances (allergy triggers ...

  3. Heater core - Wikipedia

    en.wikipedia.org/wiki/Heater_core

    In a car equipped with air conditioning, outside air, or cabin air if the recirculation flap has been set to close the external air passages, is first forced, often after being filtered by a cabin air filter, through the air conditioner's evaporator coil. This can be thought of as a heater core filled with very cold liquid that is undergoing a ...

  4. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    Another sign that could mean that the HVAC system is not running perfectly fine is if there is a bad smell to the air that it is providing. That often means that the air filters need to be replaced. Changing the air filters on an HVAC system is really important because they are exposed to a lot of dust depending on where your HVAC system is and ...

  5. Furnace (central heating) - Wikipedia

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

    The second category of furnace is the forced-air having atmospheric burner style with a cast-iron or sectional steel heat exchanger. Through the 1950s and 1960s, this style of furnace was used to replace the big, natural draft systems, and was sometimes installed on the existing gravity duct work.

  6. This Is the Best Temperature to Set a Thermostat in Summer - AOL

    www.aol.com/lifestyle/best-temperature-set...

    If a thermostat is in a hotter area of the home, it will keep asking the air conditioner to pump cool air even if the rest of the home is already cooled to 78 degrees F or lower. Try to avoid the ...

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