Bathroom Ventilation Bathroom Exhaust Fan Venting Options

Our sketch shows a bath vent fan exiting up through the roof.

Bathroom ventilation bathroom exhaust fan venting options. Bathroom ventilation requirements summary the model building codes adopted by most jurisdictions typically require bathroom ventilation to be provided either by an operable window 3 sq. Through the roof or an exterior gable wall. A recirculating bath fan would be a workable option for a half bath because there s no shower to fill the space with moisture.

Section 1203 4 2 1 of california s building code requires all bathrooms with a bathtub shower spa or similar fixtures to be ventilated by an exhaust fan. Bathroom exhaust fan venting code summary section r303 3. The location of the bathroom will determine how extensive the ductwork will be.

Or greater or by mechanical means a bathroom vent fan 20 continuous or 50 cfm intermittent vented to the building exterior. You may be able to configure a short route. Instead it passes bathroom air through a filter medium that removes odors.

Options for venting a bathroom exhaust fan include best to worst. Bathroom ventilation is required by law to prevent the buildup of mold so ducted ventilation is one option people have. Other ventilation options are windows and fans that blow the air into another room.

No matter the location of the bathroom you can vent the exhaust fan through the wall. Based on where your bathroom is located in your home you may have no other options except ducted ventilation. Install a recirculating fan in a half bath.

There are really only three venting options. 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. Ideally your fan should be near the tub or shower but not right next to an air conditioning heating vent as the forced air can create currents that disrupt the bathroom fan s steady intake of.