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Old 08-13-2012, 12:55 PM   #1
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Size if return vent

I opened my wall in my garage to find a return without an insulated pipe. I have to move it any anyway to open a door. Since its an outside wall, would you run 6" vent pipe, insulate and attach to existing main return line? Thanks.

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Old 08-13-2012, 03:41 PM   #2
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Size if return vent

What does it serve? A tiny 8x8 room with a 4" supply could get by with a 6" return. Anything bigger and I'd want at least an 8".

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