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-   -   Should I seal return air duct? (http://www.diychatroom.com/f17/should-i-seal-return-air-duct-13319/)

phareous 11-12-2007 09:30 AM

Should I seal return air duct?
 
I got a new gas pak last year. The contractor hooked the return air duct to it using duct tape. When I went under the house yesterday I could hear air leaking.

Should I seal it up air-tight with mastic, or is it better to leave it leaky (to allow fresh air into the house)?

undone 11-12-2007 11:14 PM

leaky duct
 
Though sometimes fresh air in a house is a good idea, from the basement or from under the house doesn't sound too wise. Mastic would probably introduce an uncomfortable odor. Get a water-based latex duct sealer from your local HVAC supplier if you can't get the contractor to come back out and do HIS job.


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