Bathroom Ventilation Fan Into Attic

Bathroom fan vent code requirements include no venting to attic areas to help reduce mold or structural problems.

Bathroom ventilation fan into attic.

You should never exhaust the bathroom fan directly into the attic. No you cannot vent your bathroom exhaust fan into the attic. For optimum performance locate it between the shower and the toilet. It seems like such an easy solution just leave a bathroom vent hose in an attic.

Through the roof or an exterior gable wall. Options for venting a bathroom exhaust fan include best to worst. No you should not vent a bathroom fan directly into an attic. However you can vent a bathroom fan through an attic while it terminates on the roof or gable end.

Climb into the attic and clear away any insulation from around the hole. Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside. Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic. The question about moist air reentering an attic through soffit vents after it has been blown out of an exhaust vent opening is a fair one but i don t think that s likely to be a significant building moisture source.

When venting a bathroom exhaust fan make sure to vent the air to the outside rather than into your attic where it can cause mold and mildew to form. It s all outdoor air anyways right.