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Old 09-14-2012, 12:39 PM   #1
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Tee in branch good or bad?

Trying to finish basemnet. Previously there were two round branches coming out of furnace/trunk they were running side by side. One branch was 8" and one was 7". Would like to make soffet smaller. Could I instead put it in a tee in 8" and tap a 7" in the end? Just wondering if this is going to mess up air flow. Please see pictures/attachments. The bottom one is where I want to tee into. The top picutre has a sheet stuffed into it. That's where the 7" used to run next to the 8"''. I have it completely removed at the moment.

Thank you.
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Tee in branch good or bad?-imag0003.jpg   Tee in branch good or bad?-imag0014.jpg  


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Old 09-14-2012, 03:04 PM   #2
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You would need a 10" pipe to feed a 8 and a 7" run. Using a 8" to feed a 8 and a 7" won't give good air flow to either run.


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