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  1. #1
    Join Date
    Jul 2013
    Posts
    2

    Default A/C cold air return

    Recently installed a new furnace and central A/C system. Should the cold air return work the same as if it were in heating mode? Seems as it would suck out the cold air being produced to cool?

  2. #2
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    6,598

    Default Re: A/C cold air return

    The HVAC return draws air from wherever it's located, usually hallways, not near registers. Your return sucks air the same way at cold mode or hot mode.

    To illustrate: if the outside temp is 90, the hallway temp is 80 and your thermostat is set on 78, then your A/C unit has an easy job, to cool it down to 78, not from 90, but from 80. There is no energy waste.

  3. #3
    Join Date
    Dec 2010
    Location
    Houston Texas
    Posts
    2,969

    Default Re: A/C cold air return

    In the deep south where we use our AC 11 1/2 months a year, its more common to place the intake high as to catch the warmer ceiling air to be cooled.

    In the frigid north its more common to place the intakes low as to catch the cold air at the floor for heating.

  4. #4
    Join Date
    Jul 2013
    Posts
    2

    Default Re: A/C cold air return

    Thanks, have a great day.

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