Sec. 22-433. Building mechanical systems.
(a) Forced air system. All structures built in the NID or SNID areas shall have a forced air HVAC system with the following features:
(1) Gas-fired appliances, including water heaters, shall be enclosed in a room separated from habitable space.
Combustion air shall be supplied to the room directly from the outside as prescribed in the current adopted building, mechanical, and fuel gas codes.
(2) Equipment for cooling of the ventilation air shall be included as part of the system.
(3) Controls shall be arranged to permit "fan only" operation without activation of the heating or cooling system.
(b) Exhaust to the outside. Provision shall be made to mechanically exhaust kitchen, bathroom and janitor/service areas so that opening of windows will not be necessary. Each duct shall be provided with at least two bends such that there is no direct line of sight from inside the structure to the outside, and shall contain a solid baffle plate across the exterior termination which will still allow adequate area for proper ventilation.
(c) Fireplaces, gas fireplaces and gas logs.
(1) Traditional wood burning fireplaces and solid fuel stoves shall not be installed in residential buildings in the NID or the SNID. The justification for this requirement is that, it is not possible to maintain a draft through the chimney for combustion air and smoke and provide sufficient noise attenuation. Gas fireplaces shall comply with installation requirements specified in the current adopted building, mechanical, and fuel gas codes and the combustion and exhaust venting configuration shown in section 22-434.
(2) Gas logs shall comply with installation requirements specified in the current adopted building, mechanical, and fuel gas codes and the combustion and exhaust venting configuration shown in section 22-434.
(d) Crawl space vent acoustical baffles.
(1) Are not required on residential buildings in the NID.
(2) Are required on residential buildings in the SNID.
(e) Attic vent acoustical baffles.
(1) Are not required on residential buildings in the NID OR SNID.
(f) Kitchen ventilation for gas-fired kitchen ranges and kitchen hood ventilation fans shall comply with installation requirements specified in the current adopted building, mechanical, and fuel gas codes and the combustion and exhaust venting configuration shown in section 22-434. Kitchen exhaust to the building exterior shall be through the stove/range/cook top hood, ventilation fan, downdraft ventilation or other approved whole kitchen ventilation systems.
(g) Gas-fired clothes dryers shall comply with installation requirements specified in the current adopted building, mechanical, and fuel gas codes and the combustion and exhaust venting configuration shown in section 22-434. (Ord. No. 2015-44, § 48, 10-12-2015; Ord. No. 2011-07, § 8, 4-11-2011; Ord. No. 2006-78, § 1(Exh. A), 1-8-2007)