Originally Posted By: dfrend
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Where should a bathroom power vent vent to?
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Daniel R Frend
www.nachifoundation.org
The Home Inspector Store
www.homeinspectorstore.com
Where should a bathroom power vent vent to?
Originally Posted By: Blaine Wiley
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I my area the bathroom vent has to vent either through an outside wall, or through the attic to the ridge vent or a roof vent with a cap. I don’t think one would want a bathroom vent to discharge somewhere else in the home!
Blaine
Originally Posted By: jdavidson
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Same here, if it vents into the attic we recommend moving it outside
Originally Posted By: lfranklin
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I agree they sould be exhusted to the outside.
Sorry to say, 90% in my area exhust in the attic.
Originally Posted By: Dave Derie
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Should vent outside, around my area they typically run them to soffit/eave vents nearet to the bathroom. If vented into the attic you are allowing moisture to collect in the attic space which leads to bad things.
Originally Posted By: psabados
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Same thing here in KC area. Maybe 10% actually vented to the exterior. Most of them just penetrate the ceiling area into the attic with about an extra 3 feet of flex-duct added.
Always recommend extending them to a vent
Paul
Originally Posted By: ekartal
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Nothing should vent to the attic. Not a good place to dump moist air.
Here in Illinois I believe it’s a code violation to boot!
Erol Kartal
ProInspect
Originally Posted By: eharden
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I had a fan dump into an unused stack for an old boiler that had been removed. While I sighted this and the seller subsequently fixed it, if the stack is no longer used, is venting this way OK?
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Eric Harden
First Choice Inspection Services
"That which does not kill me, makes me stronger."
Originally Posted By: ekartal
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Hey Eric,
Not too sure about that one! 
Erol Kartal
Originally Posted By: jonofrey
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Bathroom exhaust vents must terminate to the outside or vented soffit area at a minimum.
The exception is that they can vent into the attic but you have to advise your client that they must go outside to fart. 
Don't get onto me about moisture. This is a joke.
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Inspection Nirvana!
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Originally Posted By: lfranklin
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John you forgot to talk about getting an outdoor air permit for when you go out side
Originally Posted By: kluce
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In Bowling Green, Kentucky area, the city inspector does not want the vent to go to the eave. He feels that air is naturally coming in and this is a conflict. It has to be terminated out the roof or six inches to a roof vent. I can see where he’s coming from. The funny thing is that he didn’t require it to be insulated like it has to be in this area.
Around here, if the heating guys run the 4 inch flex one way and the electrician installs the fart fan the other direction and there is a long 90 degree bend to hook up. The city inspector will not pass it. Doesn't matter how short the run is. Never understood that one.
Originally Posted By: dbroad
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It needs to run outside, and not to the front door. I worked on some Condos with 200 units and the fart fans were ran 4’ to a vent at the front door. If you were in the restroom the people at the door knew it. When the owner found out , all 200 units were torn apart and ran to the roof as should be. Spent countless of thousands trying to save a few hundred.
Originally Posted By: kmcmahon
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| kluce wrote: |
| In Bowling Green, Kentucky area, the city inspector does not want the vent to go to the eave. He feels that air is naturally coming in and this is a conflict. It has to be terminated out the roof or six inches to a roof vent. I can see where he's coming from. The funny thing is that he didn't require it to be insulated like it has to be in this area.
|
I would agree that venting into a soffit is opposite of air flow into the attic thru the soffit. In essence it would be the same as venting into the attic. You would want to terminate thru the roof.
Of course the only bathrooms that need vents are ones with a shower. Gotta get that moisture out of the house! 
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Wisconsin Home Inspection, ABC Home Inspection LLC
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Originally Posted By: rcloyd
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The IRC and Kentucky Residential code require the exhaust air from a bathroom fan to vent to the outside air. Installing the vent pipe through the attic space and through the roof is ok if you insulate the duct. Otherwise condensation will form on/in the pipe and you will have a water problem. Exhaust fan termination points must never occur in the attic. If you see this on an inspection be sure to call it out for correction.
The best way IMHO to vent a bath exhaust fan is through the joist space, and the band board on an outside wall or through the attic under the insulation to a gable end wall.
Regards,
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Russell G. Cloyd
Intra-Spec Home Inspections
& Code Consulting, LLC
859-586-4591
www.intra-spechomeinspections.com
Originally Posted By: dfrend
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I found one that vented to the living room. Talk about clearing the room. Another terminated inside a wall space.
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Daniel R Frend
www.nachifoundation.org
The Home Inspector Store
www.homeinspectorstore.com