Bathroom Exhaust Fan Install Attic

For quick reference a 50 square foot bathroom needs a 50 cfm fan.

Bathroom exhaust fan install attic.

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. Bathroom vent fans are rated by how many cubic feet of air they can move in one minute known as the cfm rating. Here is the link to th. Small bath fans provide adequate bathroom ventilation for 79 sq ft.

There are wall mount exhaust fans as well as ceiling exhaust fans. And under while medium bath fans work well for bathooms 70 to 100 sq ft. 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. Letting the fan exhaust into an open attic will cause moisture buildup on the underside of the roof.

Another consideration to think about is the placement of your fan. 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. Ceiling fans vent either into the. Installing a bathroom fan with no attic is not much different from any other fan installation.

For bathroom over 100 sq ft use a large or exhaust fan to circulate the air. Avoid venting through a soffit vent or ridge vent. To determine which size fan to buy for your bath multiply the room s square footage by 1 1. The bathroom here is below an accessible attic so tom ran the exhaust duct across the attic and out a gable end.

If you have access to the attic the fan can vent either through a gable wall or roof. If you have a bathroom with a separate enclosed toilet you ll also need an additional fan for that space. It s just a matter of figuring out the best route for running the exhaust duct. 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.

If the hole is too small then you ll need to increase the dimensions.