Quote:
Originally Posted by ducati1974
On some systems that "box" they're sitting on is the return air plenum. If you see a return grill low on the other side of the wall or you see no return air ducting this is probably the case. Investigate further- rarely is space wasted!
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Ditto.
Also, you could walk through an "under construction" home of the same floor plan and see how all the duct work runs.
Bill
