All occupiable rooms shall be ventilated by natural or mechanical means, or by a combination of both. Natural ventilation may be provided except where mechanical ventilation is required by article seven or eight of this subchapter.
Buildings or structures and the walls enclosing habitable or occupiablerooms and spaces in which persons live, sleep or work, or in which feed, food ...
Buildings or structures and the walls enclosing habitable or occupiablerooms and spaces in which persons live, sleep or work, or in which feed, food ...
Buildings or structures and the walls enclosing habitable or occupiablerooms and spaces in which persons live, sleep or work, or in which feed, food ...
Buildings or structures and the walls enclosing habitable or occupiablerooms and spaces in which persons live, sleep or work, or in which feed, food ...