Venting Bathroom Fan Through Existing Roof Vent

If you re tempted to vent your exhaust fan through an existing roof vent or even vent it into the attic don t do it.

Venting bathroom fan through existing roof vent.

Bath vent fan installation building codes bath vent fan troubleshooting bath vent fan repair. The master bathroom and the 2nd bathroom vent through the roof and through the same opening. This article series explains why bathroom vent fans are needed and describes good bath vent fan choices necessary fan capacity and good bath vent fan and vent duct installation details. Next use aviation snips to cut slits into the sheet metal sleeve.

It eliminates the need for routing ductwork through the house and these fans usually dry the bathroom more quickly. If you have two bathrooms that are close together and one has an exhaust fan and the other doesn t you might be wondering if you can tie a new exhaust duct into the existing one. Each bathroom has its own exhaust fan. First you ll partially block your roof vent with the piping reducing the flow of cooling air through your attic.

Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. The 2 pipes one a 4 master and the other a 3 2nd do not go through the ceiling but into a common box that goes through the roof. Pass the opposite end of the duct through the hole in roof. Bend over the tabs then nail the tabs to the roof.

How to install a bathroom vent fan. More often bathroom fans vent out through a duct running up to the roof. Second during cold winters you ll be blowing warm moist air onto a cold surface the roof vent and roof plywood. Run a thick bead of tri polymer sealant along the underside of vent hood.

We explain how to install bathroom exhaust fans or vents the vent ducting. The 2nd bathroom vent drips on the floor and is ruining the ceiling. Each fan vents separately out the roof.