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-   -   What is this part of Air Duct? (http://www.houserepairtalk.com/f45/what-part-air-duct-14166/)

ccpyue 06-10-2012 12:02 PM

What is this part of Air Duct?
 
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I found this Air Duct ending in my basement, seems is an opening. Could someone tell me what is this for? will the heat or air-con escape from here in to my basement? Shall I seal it totally? Thank you.



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