The basement is really poorly insulated and sealed. in the winter massive drafts from under the stairs when the furnace isn't on. I am planning on either ducting the return air as per Ddubya (above), or boxing in the area immediately under the stairs and putting in a barometric damper that stays closed, but automatically opens when the furnace kicks on.
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2016 Montana High Country 310RE
2020 Chevrolet Silverado 3500 HD LT CC 4x4 Duramax
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