9.32.2.1.Required Ventilation

(1) The non-heating-season ventilation required by Clause 9.32.1.2.(1)(a) shall be supplied by (a) natural ventilation in accordance with Article 9.32.2.2., or (b) a mechanical ventilation system in accordance with Article 9.32.2.3. 9.32.2.2 Non-Heating-Season Natural Ventilation (1) The unobstructed openable ventilation area to the outdoors for rooms and spaces in residential buildings ventilated by natural means shall conform to Table 9.32.2.2. (2) Where a vestibule opens directly off a living or dining room within a dwelling unit, ventilation to the outdoors for such rooms may be through the vestibule. (3) Openings for natural ventilation other than windows shall provide protection from the weather and insects. (4) Screening shall be of corrosion-resistant material. Table 9.32.2.2. Natural Ventilation Forming Part of Sentence 9.32.2.2.(1) Location Minimum Unobstructed Area Bathrooms or water-closet rooms 0.09 m² Unfinished basement space 0.2% of the floor area Within a dwelling unit Dining rooms, living rooms, bedrooms, kitchens, combined rooms, 0.28 m² per room or dens, recreation rooms and all other finished rooms combination of rooms Bathrooms or water-closet rooms 0.09 m² per water closet Sleeping areas 0.14 m² per occupant Other than within a Laundry rooms, kitchens, recreation rooms 4% of the floor area dwelling unit Corridors, storage rooms and other similar public rooms or spaces 2% of the floor area Unfinished basement space not used on a shared basis 0.2% of the floor area