§ 27-892 Construction.
AC § 27-892
Vent connectors for conversion burners without draft hoods, or other gas-fired equipment without draft hoods, shall be constructed of materials having resistance to corrosion and temperature not less than that of no. 24 galvanized sheet gauge steel.
(a)Vent connectors used for gas-fired equipment having draft hoods and for conversion burners having draft hoods, shall be constructed of type B gas vent material or materials having resistance to corrosion and temperature not less than that of no. 26 galvanized sheet gauge steel.
(b)The vent connector between the equipment and the vertical gas vent or chimney shall have the greatest possible initial rise consistent with the headroom available in the equipment area and with the required clearance to combustible material. The horizontal run of the vent connector shall be as short as possible and the equipment shall be located as near the gas vent or chimney as practicable. The maximum length of an uninsulated horizontal run of vent connector shall not exceed seventy-five percent of the height of the gas vent or chimney.
(c)No vent connector shall pass through floor or ceiling construction.
