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Posted by Harold on December 10th, 2002 07:37 PM
In reply to Closing off AC registers when electric heat is use. by Robert Hockstein on December 10th, 2002 07:05 PM [Go to top of thread]

Air that gets up into the ceiling duct system will be chilled inside the ductwork. It would be somewhat more efficient not to heat that air that will fall back down into the rooms. Covering and closing off all the vents in the entire complex is probably not something the maintenance crew would enjoy doing.

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