Bathroom Fan Venting Through Wall How High
Required Bathroom vent fan ventilation rate in CFM. This ventilation code specifies a bathroom exhaust airflow rate for toilet rooms and bathrooms (not served by a window of adequate size) of. 25 or 50 cfm/ft for hotels, motels, resorts and dormitories, and a slightly more modest 20 / 50 cfm for private dwellings.
With a fan pushing 110 cu. ft. per minute, and air at 80°F and 80% relative humidity, as you might have when taking a nice steamy shower, you're creating almost 3⁄4 cup of condensate during a 10-minute shower when it's 25° outside.
No matter the location of the bathroom, you can vent the exhaust fan through the wall. Ductwork is what will connect the fan to the outside. The location of the bathroom will determine how extensive the ductwork will be. You may be able to configure a short route. However, bathrooms that are further from an exterior wall will usually have a longer, more complex route.
Should a bathroom fan in Ontario be vented through the roof or through the fascia? Carmen asked us the building codes in Ontario generally say about the proper location on a house (the roof or fascia/soffits) for venting bathroom fan air to the outside. Bathroom fan expert Glenn Curtis, Soler Palau Canada, has the answer.
Bath Fans by Room Size Buyers Tip: Choose a fan that can move at least 1 CFM per square foot of room. For example, for a 50-79 sq. ft. bathroom, select a fan with a 50 to 80 CFM rating.
Vent exhaust fans through a roof hood Roof vent hood details. Family Handyman. The best exhaust fan venting is through smooth, rigid ducts with taped joints and screwed to a special vent hood. Although this isn't always possible in attic crawl spaces, you should always insulate the duct to prevent condensation problems.