The following changes, deletions and amendments are made to the specified sections in the 2015 International Mechanical Code adopted in Section
22-511. Where an adopted section of the 2015 International Mechanical Code has not been changed, deleted, or amended by this ordinance, it is adopted as worded in the 2015 International Mechanical Code.
(1) 304.2 Conflicts. Where conflicts between this code and the conditions of listing or the manufacturer’s installation instructions occur, the provisions of this code shall apply.
Exception: Where a code provision is less restrictive than the conditions of the listing of the equipment or appliance or the manufacturer’s installation instructions, the conditions of the listing and the manufacturer’s installation instructions shall apply; except for code amendments as outlined in section 501.3 of the International Mechanical Code.
(2) 307.2.3. Auxiliary and secondary drain systems. In addition to the requirements of section 307.2.1, where damage to any building components could occur as a result of overflow from the equipment primary condensate removal system, one of the following auxiliary protection methods shall be provided for each cooling coil or fuel-fired appliance that produces condensate:
(3) 501.3. Exhaust discharge. The air removed by every mechanical exhaust system shall be discharged outdoors at a point where it will not cause a public nuisance and not less than the distances specified in section 501.3.1. The air shall be discharged to a location from which it cannot again be readily drawn in by a ventilating system. Air shall not be exhausted into an attic, crawl space, or be directed onto walk-ways.
Exceptions:
1. Whole-house ventilation-type attic fans shall be permitted to discharge into the attic space of dwelling units having private attics.
2. Commercial cooking recirculating systems.
3. Where installed in accordance with the manufacturer’s instructions and where mechanical or natural ventilation is otherwise provided in accordance with chapter 4, listed and labeled domestic ductless range hoods shall not be required to discharge to the outdoors.
4. Residential restroom exhaust fans shall be allowed to discharge exhaust into the attic area, if the exhaust pipe from the exhaust fan extends a minimum of 18 inches above the top layer of attic insulation.
(4) 504.5 Dryer exhaust duct power ventilators. Domestic dryer exhaust duct power ventilators shall be listed and labeled to UL 705 for use in dryer exhaust duct systems. The dryer exhaust duct power ventilator shall be installed in accordance with the manufacturer’s instructions and readily accessible.
(1966 Code, sec. 7-18; 2001 Code, sec. 22-512; Ordinance 110-2003, secs. 2, 3, adopted 11/18/03; Ordinance 16-2007, sec. 4, adopted 2/6/07; Ordinance 45-2007, sec. 3, adopted 5/1/07; Ordinance 53-2010, sec. 5, adopted 9/21/10; Ordinance 33-2011, sec. 3, adopted 7/5/11; Ordinance 57-2015, sec. 3, adopted 12/1/15; Ordinance 55-2022 adopted 11/15/2022)