[zephed666]

Hello:

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!

 

[Ron6519]

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
Ron

 

[Avadon]

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?

 

[mem]

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.