How To Vent Bathroom Fan

Turning the fan off.

How to vent bathroom fan. Bathroom vent fans are rated by how many cubic feet of air they can move in one minute known as the cfm rating. Let the bathroom vent fan run throughout your bath or shower and just as importantly leave it on for at least 15 minutes after you re finished to fully air out the space. This will serve as a reference point for positioning the wall cap.

Fans also have a sound rating measured in sones. For bathroom over 100 sq ft use a large or exhaust fan to circulate the air. 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.

It is moist warm and can remain in that state for quite a while if there is no ventilation. In this video this old house general contractor tom silva explains how to vent a bathroom fan. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.

We explain how to install bathroom exhaust fans or vents the vent ducting. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. Small bath fans provide adequate bathroom ventilation for 79 sq ft.

All municipalities have different requirements but some do not draw a hard line on requiring exhaust fans. How to install a bathroom vent fan. Bath vent fan installation building codes bath vent fan troubleshooting bath vent fan repair.

From outside use 4 inch hole saw to cut hole for wall cap. Options for venting a bathroom exhaust fan include best to worst. To determine which size fan to buy for your bath multiply the room s square footage by 1 1.