Trying to work out the best way to vent a bathroom using a fan with 4" pipes
> and feeding through the roof.
> It is a bungalow but there is no way to vent through a wall so it has to be
> the roof.
No way? Guessing the outside wall must be all window except above the bath. If so think about SELV fan above bath. Alternatively is it possible to duct to the soffit?
Alan