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Piwoslaw · 10-26-13, 02:07 PM

The good thing about using attic heat to warm up the basement is that you can use cooler air than for heating the house, so there are more days during the year when you can harvest this lower grade heat. And a warmer basement = warmer floor above it.

Xringer, iirc you mentioned that you pump warm air from the attic into the basement, and at the same time pump cooler air from from the basement floor outdoors. Why not pump the basement air back into the attic, since it is (most likely) warmer than the outdoor air that is being sucked into the attic?

10-26-13, 02:07 PM	#10
Piwoslaw Super Moderator Join Date: May 2009 Location: Warsaw, Poland Posts: 961 Thanks: 188 Thanked 110 Times in 86 Posts	The good thing about using attic heat to warm up the basement is that you can use cooler air than for heating the house, so there are more days during the year when you can harvest this lower grade heat. And a warmer basement = warmer floor above it. Xringer, iirc you mentioned that you pump warm air from the attic into the basement, and at the same time pump cooler air from from the basement floor outdoors. Why not pump the basement air back into the attic, since it is (most likely) warmer than the outdoor air that is being sucked into the attic? __________________ Ecorenovation - the bottomless piggy bank that tries to tame the energy hog.