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Old January 15, 2011, 03:18 PM   #17
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Join Date: September 5, 2010
Posts: 389
Something on the HVAC side of things, there are heat exchanger devices that allow exchange of air while transfering heat to the incoming air. Some are pretty much paralell ducts and some use a rotating disc that transfers heat.

The smaller heat exchangers are installed on some newer houses that are built so tight no fresh air enters. I'm considering one for my garage for when it is warmer outside than inside but I don't want moisture to enter.
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