(A) Ventilating systems shall be installed and maintained so that the rapid spread of heat, flame or smoke through the system will be prevented, and so that under conditions of use the temperature of any combustible material adjacent thereto, or in contact therewith, will not exceed a safe temperature.
(B) Stairways, passageways, exits, shafts, hoistways or attics shall not be used as plenum chambers.
(C) Ducts shall be securely fastened in place and appropriately fire-stopped.
(D) Ducts and other air handling equipment shall be of non-combustible material.
(E) Filters shall be installed and maintained so as not to constitute a fire or smoke hazard.
(F) Ducts passing through or located within combustible construction shall be separated from such construction by a clearance of at least one-half inch or by a non-combustible insulating material at least one-fourth inch thick.
(G) Air required for ventilation shall be taken from the exterior or shall be quality-controlled.
(H) Exhaust air from a dwelling unit or space whose contents may emit odors, fumes or vapors shall not be circulated to other occupied spaces within the building.
(Prior Code, § 19-258) (Ord. 312, passed 3-25-1963) Penalty, see § 171.999