How To Vent A Bathroom Fan

A bathroom exhaust fan is one of the best ways to keep the humidity in your bathroom at a comfortable level and keep mold at bay.

How to vent a bathroom fan. And under while medium bath fans work well for bathooms 70 to 100 sq ft. It is moist warm and can remain in that state for quite a while if there is no ventilation. Small bath fans provide adequate bathroom ventilation for 79 sq ft.

The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. For example a 100 square foot bath would require a 110 cfm rated fan. Behind a gable vent.

For bathroom over 100 sq ft use a large or exhaust fan to circulate the air. Drive nail through house wall from attic. Fans also have a sound rating measured in sones.

From outside use 4 inch hole saw to cut hole for wall cap. The first step in figuring out how to install a bathroom fan is cutting a hole based on the size of the fan you need. Options for venting a bathroom exhaust fan include best to worst.

We explain how to install bathroom exhaust fans or vents the vent ducting. How to install a bathroom vent fan. To determine which size fan to buy for your bath multiply the room s square footage by 1 1.

Through the roof or an exterior gable wall. In this video this old house general contractor tom silva explains how to vent a bathroom fan. 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.