Quote:
Originally Posted by patssle
Isn't ductwork in the foundation better than running through the attic?
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Most construction around here is slab on grade, so ductwork in the foundation isn't easy. If you're building new, design the house to permit ductwork in the living space.
If you're referring to ductwork in a crawlspace, I think it's bad unless that space is sealed and insulated. The issue is the humidity. The tape and insulation don't last in that damp environment.
Another issue with ductwork in a vented crawlspace or attic is duct leakage. When ducts leak, your house is pulled into vacuum, and outside air must be pulled inside the house. It's equivalent to cracking a window open. Would you want a window open when it's 90 outside? How about when it's 25?