Are Exhaust Fans Required In Bathrooms Ontario. Exhaust Ducts and outlets 1 Except as provided in Sentence 2 exhaust ducts of nonmechanical ventilating systems serving separate rooms or spaces shall not be combined. Most communities require bathrooms to have either a window that can be opened or an electric vent fan that will exhaust moisture from the bathroom to the outdoors.
Kitchener Waterloo 29092021. Light and ventilation by means of a window which has a minimum size of three square feet half of which is operable. Kitchen and Bathroom Exhaust Fans 1 An exhaust fan that provides at least the air-flow rate specified in Table 93236.
Chapter 15 is specific to exhaust systems related to clothes dryers domestic cooking toilet rooms bathrooms and whole-house ventilation systems.
When natural ventilation is not provided the code does allow mechanical ventilation via an exhaust fan to be provided given a minimum exhaust rate is met. Tables 2a and 2b lists key issues in the building codes that affect indoor quality in residential and commercial buildings respectively along with provisions of ASHRAE Standards 622 for residential. For example a six-foot by eight-foot bathroom would require a fan. To determine the size of the fan needed for your bathroom the Home Ventilating Institute suggests the following formula.
