Install Bathroom Vent Into Attic

The attic bathroom will need electricity to supply at least two 20 amp gfci outlets and one switch controlled ceiling light.

Install bathroom vent into attic.

Dangers of wet bath exhaust vent air re entering the attic. Install bathroom electrical circuits. No you cannot vent your bathroom exhaust fan into the attic. Each bathroom has its own exhaust fan.

This involves running ductwork from the fan usually though an attic and out through the roof. When venting a bathroom exhaust fan make sure to vent the air to the outside rather than into your attic where it can cause mold and mildew to form. Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic. Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside.

It is because of this that many builders tend to advise against this method. You should never exhaust the bathroom fan directly into the attic. Remove the grill cover. Use a circuit tester to ensure that the power is turned off.

Either way the vent will have to go directly to the outside and installed with a vent hood cover. Both bathrooms are vented by a single in line fan that has one exhaust vent running through the roof. Do not spill bath vent air into the building attic or roof cavity where it will condense on and damage building insulation roof sheathing possibly framing and where it will certainly encourage mold growth. Now where the discharge point is is going to be up to you.

Remove your old exhaust fan. Each fan vents separately out the roof. Bathroom exhaust fans perform an important function by removing excess moisture from your home. These are easy to use and can be purchased at most home improvement stores.

Bathroom exhaust fans are not required by most codes. You might have to remove a few screws to get it out. In order to accomplish this the roof has to have a hole cut in it. In lieu a window 3 feet square or more capable of being opened at least halfway will suffice.

See details at bathroom vent codes. For optimum performance locate it between. One in line centrifugal fan can be mounted in the attic to exhaust the moisture from two bathrooms. So what you want to do is you want to install a duct a vent duct and you can use flex duct for this.

Drill a reference hole draw a mark on the bathroom ceiling where you d like to install the vent fan. A lot of options. That will take it from the bath exhaust fan to a discharge point. Turn off the breaker box.