Edwin Pawlowski wrote:
"John Harlow" wrote in message

What would be the problem with ducting cool air from under a house
to the attic in warmer months to help with cooling, and just the
opposite in the winter to help with heating?


I'd be concerned about the quality of air from under the house. Mold
spores could cause problems.

Interesting - wouldn't they also cause problems under the house?

How about a filter, or a heat exchanger made with some ductwork?