This involves running ductwork from the fan usually though an attic and out through the roof.
Install bathroom vent thru roof.
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Climb into the attic and clear away any insulation from around the hole.
From inside the attic drive a nail through the roof directly above the bathroom vent fan.
Center the nail between.
It is because of this that many builders tend to advise against this method.
From the roof find the nail and use the utility knife to cut roof shingles from around the nail.
With the pipe in a vertical position trace around the pipe using a pencil.
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For optimum performance locate it between the shower and the toilet.
Choosing a whole house fan.
Draw a mark on the bathroom ceiling where you d like to install the vent fan.
The lower half of the flange sits on top of the shingles.
How to vent a bath fan through the roof 1.
Any person competent in installing an outside vent either thru the roof soffit or gable hip end of the house thru the siding.
Install the vent into the ceiling.
Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic.
The penetration will be oval to have a round pipe exit vertically through a pitched roof you need an oval hole in the roof.
Apply a bead of asphalt roof cement on the bottom of the vent.
In order to accomplish this the roof has to have a hole cut in it.
This system is quiet too.
Go into your attic.
Nail the lower corners with roofing nails and tar the heads.
You mount a switch in each bathroom.
Slide a flat pry bar underneath the.
Cut the hole overhead in the ceiling following the manufacturer s instructions.
Slide the vent under the shingles so they cover the top half of the vent flange.
Attaching the vent pipe in the attic attach the vent pipe from the vent up to the roof.
Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof.
Each bath fan should be on a separate 4 or larger duct and the outside vent portion must have a baffle damper to prevent anything from coming into the duct work.