Bathroom Exhaust Fan Install Attic

The bathroom here is below an accessible attic so tom ran the exhaust duct across the attic and out a gable end.

Bathroom exhaust fan install attic.

It s just a matter of figuring out the best route for running the exhaust duct. Ceiling fans vent either into the. Avoid venting through a soffit vent or ridge vent. There are wall mount exhaust fans as well as ceiling exhaust fans.

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. To determine which size fan to buy for your bath multiply the room s square footage by 1 1. 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. Small bath fans provide adequate bathroom ventilation for 79 sq ft.

For bathroom over 100 sq ft use a large or exhaust fan to circulate the air. Bathroom vent fans are rated by how many cubic feet of air they can move in one minute known as the cfm rating. And under while medium bath fans work well for bathooms 70 to 100 sq ft. The warm air will exhaust out the duct and enter back into the attic through the soffit vent or ridge vent.

If you have access to the attic the fan can vent either through a gable wall or roof. Another consideration to think about is the placement of your fan. Here is the link to th. If you have a bathroom with a separate enclosed toilet you ll also need an additional fan for that space.

Those individuals who are installing a bathroom exhaust fan without attic access will want to first measure the hole in the ceiling to make sure your new fan will fit in. Letting the fan exhaust into an open attic will cause moisture buildup on the underside of the roof. Bathroom exhaust fans perform an important function by removing excess moisture from your home. For quick reference a 50 square foot bathroom needs a 50 cfm fan.

What is important is that the fan does its job of removing excess moisture that can lead to a multitude of problems from peeling paint to unhealthy mold and mildew.