Bathroom Exhaust Fan Through Roof Or Soffit

A hole in the roof may cause it to leak.

Bathroom exhaust fan through roof or soffit. As the warm moist air leaves the bathroom through a soffit it leaves in a downward motion. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. Cooler air which is found under your roof overhang soffit is drawn up through the perforations of the soffit and exhausted through your roof venting system. In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover.

Here is a guide on how to vent a bathroom fan through soffit. Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out. 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. I have gotten mixed opinions on whether to vent the new fan through the roof or through the soffit eave.

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. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. The bathroom exhaust should never be vented anywhere near nor through the soffit area. Sometimes bathroom fan soffit vent fan is the easiest solution because you have easy access in the attic and you don t have to climb onto the roof.

Soffit exhaust vent cover the soffit cover does the same thing as vertical wall mounted bath vent covers they keep out exterior air moisture and birds. In other cases it can be difficult to vent a second story bathroom to the side of the house. The 2nd bathroom vent drips on the floor and is ruining the ceiling. The master bathroom and the 2nd bathroom vent through the roof and through the same opening.

This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space. The roof contractor recommends the soffit to minimize protrusions through the roof. The point of a bathroom exhaust vent or any vent really is to remove hot moist air from the house. And while both a roof vent and an overhang vent perform this task there is one big difference.