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  1. #1
    Join Date
    May 2005
    Posts
    1
    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
    Location
    San Luis Obispo County, CA
    Posts
    215
    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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