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  1. #1
    Join Date
    May 2005
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    I was just wondering about return side fresh air intakes. Basically HVAC installer recommends, and I was wondering what benfits and any added heating and cooling costs with it. We live in South Dakota

  2. #2
    Join Date
    Apr 2005
    San Luis Obispo County, CA
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    How old and tight is your house? You need to know the air infiltration rate to know if you need one or not. This is done by having a blower door test. Most older homes leak so much that you don't need any more outside air coming in. If the house is tight, use an air exchanger, not just a vent in the return to the outside. An air exchanger will heat/cool the incoming air with the outgoing air, lowering cost. An air intake alone will just pressurize your house and drive out your precious heated or cooled air.

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