(a) Type A. Lined chimneys or metal smokestacks, as provided for in this chapter. Type A flues are required for all incinerators, all appliances which may be converted readily to the use of solid or liquid fuel, and all boilers, furnaces and other appliances except approved appliances which produce flue gas temperatures not in excess of 550 degrees Fahrenheit at the outlet of the draft hood when burning gas as the manufacturer’s or utility company’s input rating.
(b) Type B. Approved vent piping of noncombustible, corrosion resistant material of adequate strength and heat insulating value, and having bell and spigot or other acceptable joints. Type B vent piping shall be used only with approved gas appliances which are not required by subsection (a) hereof to be vented to Type A flues.
(c) Type C. Vent pipes of sheet copper of not less than twenty-four U.S. gauge or of galvanized iron of not less than twenty gauge or of other approved corrosion-resistant material. Type C vent pipes may be used for runs directly from the space in which the appliance is located through a roof to the outer air, provided that Type C vent pipes shall be installed as required.
(Ord. 42-1981. Passed 2-23-81.)