Is there any requirement for how long the 4 inch flexible duct runs should be a ceiling mounted bathroom exaust fan ? I’d like to run it about 12 feet, I’m concerned that the mositure being blown out of the bathroom may condensate in the duct and the condensation will run back down into the fan. The house is in So California, should I use insulated flex tubing and not worry about it ? All this is to avoid cutting another hole in the roof closer to the fan. Fan is a Broan if it matters. thanks.
Kirk
Edited 2/25/2005 10:33 am ET by Kirk
Replies
I take it your running the flex tube out the gable or the soffit. If you do this make sure there is positive drainage on the tube otherwise water will collect in the 'dips'. I would consider going ou the roof.
David-thanks for the reply, I can only go out the roof which is about 6 ft about the fan. I can run it with no dips, but wondering if condensation will accumulate in the tube ?
>> ... but wondering if condensation will accumulate in the tube?Not if you insulate it.