Venting Bathroom Fan Through Existing Roof Vent

Pass the opposite end of the duct through the hole in roof.

Venting bathroom fan through existing roof vent.

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. Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. Each fan vents separately out the roof. 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.

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. Bend over the tabs then nail the tabs to the roof. We explain how to install bathroom exhaust fans or vents the vent ducting. The master bathroom and the 2nd bathroom vent through the roof and through the same opening.

More often bathroom fans vent out through a duct running up to the roof. Although most bathroom vent fans are quite simple some have bells and whistles such as motion sensors that switch the. 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. Bath vent fan installation building codes bath vent fan troubleshooting bath vent fan repair.

How to install a bathroom vent fan. Each bathroom has its own exhaust fan. Next use aviation snips to cut slits into the sheet metal sleeve. Run a thick bead of tri polymer sealant along the underside of vent hood.

This involves running ductwork from the fan usually though an attic and out through the roof. First you ll partially block your roof vent with the piping reducing the flow of cooling air through your attic. Take the end of the duct with the connector fitting and attach it to bath vent fan.