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Old 09-22-2012, 12:00 PM   #1
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Where and how to vent exhaust fan


M currently finishing my basement and I'm going to add a full bath down there. It's all roughed in for the plumbing but I don't think they rough it in for the ceiling exhaust fan. Where do you run the exhaust to? Thanks

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Old 09-22-2012, 01:12 PM   #2
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Where and how to vent exhaust fan


You have to post this into the HVAC section. But to answer you, you run the exhaust ttorugh the side or roof of the house (don't vent it just into the attic, humidity can do a lot of damage there).

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Old 09-22-2012, 09:16 PM   #3
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Where and how to vent exhaust fan


Try to go through the floor joist cavity above the bathroom to the exterior. Keep 3' from any opening to the house, required by code; opening window, door, air supply to HVAC, etc. Foil-tape all joints, use a flapper door at termination hood. May require a minimum distance above ground snow build, if in certain areas. I'll move you to HVAC for more responses...

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Old 09-22-2012, 09:50 PM   #4
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Where and how to vent exhaust fan


Thanks for the help Gary
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Old 09-22-2012, 11:38 PM   #5
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Where and how to vent exhaust fan


You're welcome, that is why we are here. I'm not in HVAC, just know some of the highlights due to being a lead remodel carpenter and field supervisor.
If you have access to the rim joist, after cutting/installing the hole, add some 2" foam board to prevent air movement and condensation there; Rigid Foam in Rim Joists

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Old 09-23-2012, 02:29 AM   #6
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Where and how to vent exhaust fan


Must also be 3' from any natural gas or propane regulator relief vents.

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