§ 27-849 Scope.
This subchapter shall establish the minimum safety requirements for, and control the design, construction, installation, alteration, and use of chimneys and gas vents.
§ 27-854 General requirements.
Chimneys or gas vents shall be designed and constructed so as to provide the necessary draft and capacity to completely exhaust the products of combustion to the outside air, and to satisfy the following conditions:
(a) Temperature. The temperature on adjacent combustible surfaces shall not be raised above one hundred sixty degrees Fahrenheit.
(b) Condensation. The condensation shall not be developed to an extent that can cause rapid deterioration of the chimney or vent.
§ 27-855 Factory-built chimneys and gas vents.
(a) Factory-built chimneys. Factory-built chimneys and chimney units shall be listed and accepted in accordance with the applicable reference standard and shall be installed in accordance with the temperature conditions and height limitations of the listing and acceptance, the manufacturer's instructions or this article, whichever is the most restrictive. Flue gas temperatures in the chimney shall not exceed the limits and durations employed during listing tests and as required by this code.
(b) Gas vents. Type B and Type BW gas vents shall be listed and accepted in accordance with the conditions of the acceptance and applicable provisions of this code.