Install Bathroom Fan Duct Roof

Look for the special fans starting at 160 at heating cooling equipment dealers.

Install bathroom fan duct roof. From up on the roof use a jigsaw or reciprocating saw to cut a 4 in. This involves running ductwork from the fan usually though an attic and out through the roof. Start in the attic and drill a hole through the roof in the desired vent location. Because the fan is in the attic you ll hardly hear it.

From inside the attic drive a nail through the roof directly above the bathroom vent fan. This system is quiet too. From the roof find the nail and use the utility knife to cut roof shingles from around the nail. For a fan and light switch with existing wiring splice the white wires and connect the grounds securely with wire.

Leave the drill bit sticking through the roof so you can find the hole. In order to accomplish this the roof has to have a hole cut in it. This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof.

After tracing the outline of the vent opening on the roofing cut through the shingles with a knife to expose the roof decking and then drill a hole for the vent with a hole saw or reciprocating saw. Center the nail between two rafters. If you don t have an attic duct see the installation steps later in these instructions. Try to keep it close to the fan location.

A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. A single exhaust exits through the roof figure a. You mount a switch in each bathroom. It is because of this that many builders tend to advise against this method.

Here is the link to th. Secure a 4 inch duct to the duct connector with hvac tape or a clamp. The duct should vent to the outside. Connect power to both switches through two pigtails spliced to the feed wire.

Connect the red wire to one switch terminal and the black wire to the other terminal. Learn the secrets to running anew exhaust line through the outside wall install a fan and connect the ducting and electrical.