Install Bathroom Fan Duct Roof

This system is quiet too.

Install bathroom fan duct roof.

This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. Secure a 4 inch duct to the duct connector with hvac tape or a clamp. A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. 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.

To install a roof vent start by choosing a good location from inside the attic and then pound a nail all the way through the roof at that location so you can find the spot from outside. The duct should vent to the outside. Start in the attic and drill a hole through the roof in the desired vent location. Look for the special fans starting at 160 at heating cooling equipment dealers.

Because the fan is in the attic you ll hardly hear it. In order to accomplish this the roof has to have a hole cut in it. Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. Leave the drill bit sticking through the roof so you can find the hole.

Connect the red wire to one switch terminal and the black wire to the other terminal. Connect power to both switches through two pigtails spliced to the feed wire. From up on the roof use a jigsaw or reciprocating saw to cut a 4 in. It is because of this that many builders tend to advise against this method.

You mount a switch in each bathroom. From inside the attic drive a nail through the roof directly above the bathroom vent fan. This involves running ductwork from the fan usually though an attic and out through the roof. We explain how to install bathroom exhaust fans or vents the vent ducting the vent termination at the wall soffit or roof vent fan wiring bath vent duct insulation bath vent lengths clearances routing and we answer just about any other bathroom ventilation design or installation question you may have.

See below for a shopping list and tools subscribe. From the roof find the nail and use the utility knife to cut roof shingles from around the nail. Here is the link to th. 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. For a fan and light switch with existing wiring splice the white wires and connect the grounds securely with wire.