Vent Bathroom Fan Through Roof Or Soffit

The good majority of bathroom fans are vented through the roof while some people are choosing to soffit vent them as an alternate.

Vent bathroom fan through roof or soffit. A hole in the roof may cause it to leak. As the warm moist air leaves the bathroom through a soffit it leaves in a downward motion. 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. 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.

Here is a guide on how to vent a bathroom fan through soffit. 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. Opposed to the traditional practices of venting a bathroom fan through a side wall or roof you can also vent it through a soffit which is much preferable in some cases as we will see in this article. Sometimes venting the bathroom fan through soffit is the easiest solution as you don t have to go onto the roof.

I have gotten mixed opinions on whether to vent the new fan through the roof or through the soffit eave. The 2nd bathroom vent drips on the floor and is ruining the ceiling. And while both a roof vent and an overhang vent perform this task there is one big difference. However natural air flow from the outside will bring the moist air back into the attic through the soffit vents kind of like a vacuum.

There is no definitive answer in the codes that pertain to where the air must vent out of the house. If you are also amongst the people who are interested in avoiding making a hole in the roof and get the deed done using a soffit you have come to the right place. 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. Even though the exhausting bathroom fan may disrupt the intake air flow of soffit venting it is a very small area and isn t going to be a big problem.

The master bathroom and the 2nd bathroom vent through the roof and through the same opening.