How To Install Vent Fan In Bathroom

This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent.

How to install vent fan in bathroom. Avoid venting through a soffit vent or ridge vent. In this particular installation tom ran the exhaust duct into the attic and through a sidewall to the outdoors. Don t install it in the wrong spot. Install a recirculating fan in a half bath.

Letting the fan exhaust into an open attic will cause moisture buildup on the underside of the roof. Lower the fan into place and secure it with drywall screws then use flexible duct pipes to vent the fan to the outside. 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. For bathroom over 100 sq ft use a large or exhaust fan to circulate the air.

Note that the bathroom vent fan must always exhaust to the outdoors. Plan the installation so the vent duct is as short as possible and makes as few turns as possible. To install a bathroom fan go into your attic and clear away the insulation where the fan will go then return to the bathroom and use a jigsaw to cut out the hole for the fan. Ideally your fan should be near the tub or shower but.

This type of bath fan doesn t exhaust air to the exterior. A heater uses more power than a light and fan so it may need to be on its own circuit. Reduce noise with an inline fan. Learn the secrets to running anew exhaust line through the outside wall install a fan and connect the ducting and electrical.

In addition to a vent fan a bathroom unit may have a light night light or heater. Other venting options includes running the duct up through the roof or down through the soffit. If you have access to the attic the fan can vent either through a gable wall or roof. A bathroom needs ventilation as much as it needs lights so a bathroom vent fan installation will probably be part of your new bathroom or your bathroom remodel.

And under while medium bath fans work well for bathooms 70 to 100 sq ft. If possible run the duct straight out through a wall. See below for a shopping list and tools. Once you ve chosen the right capacity bathroom vent fan make sure to install it in the right place.

The warm air will exhaust out the duct and enter back into the attic through the soffit vent or ridge vent. Instead it passes bathroom air through a filter medium that removes odors. Small bath fans provide adequate bathroom ventilation for 79 sq ft.