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Old 08-22-2012, 01:26 PM   #1
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Bathroom Exhaust Requirements

Have been renovating an old house and we were told that when we redo the baths if it has a tub or shower unit the exhaust needs to vent to the exterior of the building but if the bath only has a toilet and sink we can vent the exhaust to the attic. Since then I have been told that ALL bath exhaust fans need to vent to the exterior of the structure. Our local building codes don't address the issue. Can someone with knowledge on this steer me straight! I'd much rather do the former than the later if I can. Thanks!

Last edited by glilley; 08-23-2012 at 06:24 AM.
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Old 08-25-2012, 07:34 PM   #2
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Bathroom Exhaust Requirements


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Old 08-25-2012, 08:57 PM   #3
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Bathroom Exhaust Requirements

All bath fans must exhaust to the exterior. Think about it, do you want to add moisture to your attic in the winter, or possible foul odors anytime at all? If your local code does not address it common sense should.
I remember seeing vent hoses from bathrooms stapled to the roof just below a roof vent years ago. I doubt that would pass todays code or the AHJ of any municipality in todays environment.
Do you want it your way or the right way?

Last edited by Missouri Bound; 08-25-2012 at 09:00 PM.
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Old 08-28-2012, 05:01 AM   #4
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Bathroom Exhaust Requirements

Its depend on your choice.Which type of design you want to add your bathroom?

Last edited by Gary in WA; 08-28-2012 at 11:16 PM. Reason: Removbed web ad that belongs below your signature line as per forum rules.
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