Installing Bathroom Fan Vent Through Soffit

Idea 5 connecting the duct to the bathroom fan.

Installing bathroom fan vent through soffit.

I have gotten mixed opinions on whether to vent the new fan through the roof or through the soffit eave. Installing a bathroom exhaust fan to the soffit can likely be done within an hour or two if you have all of the tools such as the vent cover a tall ladder the vent hose vent clamp and jig saw. I am getting a new roof installed and tear off and likely a lot of plywood and am simultaneously getting a new bath vent fan. Note that the bathroom vent fan must always exhaust to the outdoors.

This way we can make sure both are positioned properly. Next we must slip a worm drive metal clamp on the inside part of duct liner. Other venting options includes running the duct up through the roof or down through the soffit. Remove the tape from the fan first.

Many old bathroom fans still use the small duct sizes of 3. How to install a bathroom fan vent in the soffit. If your bathroom fan is high powered it may use large duct sizes like 4 or 6. 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.

Never allow the duct to simply blow into an attic crawlspace or. If you need to install a new duct for venting your bathroom exhaust through the soffit then you should verify the duct size used with your bathroom fan. Check the damper and the screen in prior to installation. A down through soffit exhaust vent design by leaving warm air in the exhaust duct when the fan is off creates a heat trap that reduces heat loss out of the bathroom through the exhaust fan duct when the fan is off in comparison with up routed vents or even horizontal vents through a gable end wall.