DIY Home Improvement, Remodeling & Repair Forum > Appliances > HVAC > Merge ducts right before venting




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Old 05-27-2011, 08:46 AM  
matt_vo
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Default Merge ducts right before venting

Hi all,
I have four exterior venting ducts for dryer, bathroom vent, rangehood and the forth one I'm not sure (suggestions?). My question is can I reduce the number of exterior vents from 4 to 2, or even 1?
I have access to the ducts where they fit into the vents and would like to merge them so that I'm left with 1 or 2 vents.

Thanks,
Matt



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Old 05-27-2011, 09:02 AM  
nealtw
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I don't know about code, but I have seen homes when vents are to close together and you could smell the dryer in the bathroom unless that fan was running too.



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Old 05-27-2011, 09:15 AM  
matt_vo
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Yea, I thought about that. Can't I install a valve so that back flow doesn't occur?

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Old 05-27-2011, 06:22 PM  
nealtw
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Yes you could do that but then you will close it in a wall or above the ceiling where it can not be serviced. Sooner or later you will have to clean the dryer pipe, this is done with a vacume and airhose fed from outside, now you vent is a problem. I would still use different pipes thru the outside wall. Done properly they will not leak.

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