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Old 04-21-2011, 07:59 AM   #1
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Venting a bathroom exhasut fan


I am adding an exhasut fan to my second floor bathroom. I have acces to the attic and was wondering what the best option to vent the fan would be. I can exhaust it vertically through the roof which would be about 3 feet from the fan or I can exhaust it horizontally out the side of the house which would be a 12 foot run. What would be the best option?

I hesitate to exhasut out the roof jut for the leaking possibility...

thanks for any help!


zephed666 is offline   Reply With Quote
Old 04-21-2011, 09:13 AM   #2
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Either case will work, but insulating the pipe might be easier through the roof. If you're putting it through an unheated space, the warm moisture laden air will condense in a cold environment if the pipe is left uninsulated


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Old 04-21-2011, 06:01 PM   #3
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Is there any code when it comes to placement of bathroom vents, cieling fan exhaust, toilet vent and sink vents? Is there like a "so many feet from the side of the roof" suggestion or code?
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Old 04-22-2011, 11:56 AM   #4
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I'd be hesitant to put it thru the roof too. Run it horizontally with a slight pitch downward toward the outside. This will keep any condensation from running back inside thru the fan. Insulate as Ron said and you should be good. A 12 foot run with one elbow should not be a problem.
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