For heating purposes, indirect systems only, such as steam, forced warm air or hot water, shall be used and no open flame shall be permitted in storage cabinets, finishing rooms, dipping rooms, spray rooms or spray booths, except that when approved by the Chief of Fire, direct-fired drying ovens or other drying ovens, and direct-fired unit heaters installed not less than eight (8) feet above the floor level and of a type approved for use in garages and airplane hangars, may be installed in finishing rooms where proper safeguards are provided to prevent flammable vapor travel to a source of ignition. Gravity warm air systems shall not be used.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)