Section 811
SECTION 811. Artificial Ventilation. (a) Rooms or spaces housing industrial or heating equipment shall be provided with artificial means of ventilation to prevent excessive accumulation of hot and/or polluted; (b) Whenever artificial ventilation is required, the equipment shall be designed and constructed to meet the following minimum requirements in changes: 1. For rooms entirely above grade and used for office, clerical, or administrative purposes, or as stores, sales rooms, restaurants, markets, factories, workshops, or machinery rooms, not less than three changes of air per hour shall be provided. 2. For rooms entirely above grade and used as bakeries, hotel or restaurant kitchens, laundries other than accessory to dwellings, and boiler rooms not less than ten changes of air per hour shall be provided. 3. For auditorium and other rooms used for assembly purposes, with seats or other accommodations not less than 0.03 cubic meter of air per minute shall be supplied for each person. 4. For wards and dormitories of institutional buildings not less than 0.45 cubic meter of air per minute shall be supplied for each person accommodated. 5. For other rooms or spaces not specifically covered under this Section of the Code, applicable provisions of the Philippine Mechanical Engineering Code, shall be followed.