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Old 02-20-2011, 11:40 AM   #1
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Bathroom Fan Location

Hi everyone,

Should I have any concerns that my bathroom exhaust fan is located 4 ft diagonally from the shower head (about 3.25 feet to the center width) in my bathroom?? Is that too far away?

I know that a bathroom exhaust fan is best located nearest the bathtub/shower, however my circumstances have made it difficult to get it much closer to the tub.

p.s. I have applied a vapor barrier to the ceiling and question how to seal it at the fan... tuck tape to the inside lip or outside lip? The fan itself has two slots on opposing edges on the inside of the housing for a spring clip to pass through for the fan cover. Doesn't that offer a path for moisture into the attic or is it that critical?



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Old 02-20-2011, 03:35 PM   #2
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4' from the showerhead is fine. It's the cfm's of the fan that matter more. My fan is on a timer switch so it runs awhile after I'm done in the shower.
Don't put a vapor barrier in the ceiling of the bathroom. I just remodeled three bathrooms in a house that had blown in insulation and a vapor barrier. The paint was peeling off the ceiling and the drywall was soaked


Last edited by mrgins; 02-21-2011 at 05:20 AM.
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Old 02-20-2011, 04:03 PM   #3
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True vapor barriers can be problematic. Since those houses had wet sheet rock, I'd sure like to know who was not running an exhaust fan, or what cfm it was if they did use it. That sounds pretty extreme, but understandable. I think bathroom exhaust fans should be running about 80-100 cfm whilst the shower is on, no? If you are going to use a poly vapor barrier, seal it with Tremco acoustical caulk, or similar. It won't harden (completely) and will stick to visqueen, your hair, fingers, etc; "black death". There are also poly-specific tapes; red and blue.
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