15-28-080 Ventilation.
   Every hazardous chemical room shall have means of natural ventilation or vent flues as required by Section 15-28-260 for material heating rooms; provided, however, that the combined area of ventilating openings which shall have closures arranged to open automatically in case of explosion or fire shall be not less than five percent of the total wall area of the room.
(Prior code §  92-8)