International Mechanical Code, 2012 edition, and all appendices thereto, published by the International Code Council is amended as follows:
A. Governing Principles:
1. The City Of Prospect Heights Amendments: The city of Prospect Heights amendments to the IBC, the IRC, other amendments, the zoning ordinance and municipal ordinances shall supersede all sections of all of the adopted model codes.
2. Conflicts: Whenever two (2) codes are in conflict, the more stringent requirement shall govern.
B. General Amendments:
1. Furnaces: Attic furnaces and crawl space furnaces are not permitted unless clearance and access, per code is provided.
2. Concrete Pad: All gas fired furnaces shall be placed on a minimum of two inches (2") of concrete or on a solid one and one- half inch (11/2") precast concrete pad. (The precast pad may be under the furnace only, and extend a few inches beyond the perimeter of the unit's footprint.) Furnaces may be placed directly on basement floor slabs.
3. Air Conditioning Equipment: Air conditioning equipment, including pads, condensing units, heat pumps, etc., are not permitted in the required side yard setbacks (per zoning ordinance).
4. Dryer Vents: All dryer vents shall be metal or metal flex. Nonmetallic vents for dryers are not permitted. See section 504.6 and amendment to section 504.6.
5. Ductwork: All ductwork shall be a closed system and in compliance with the International Mechanical Code section 603. Use of a stud space or joist space for a supply or plenum return is not permitted. Gypsum ducts are not permitted. Delete sections 603.5 and 603.5.1.
6. Furnaces On Wood Floors: Provide a one and one-half inch (11/2") precast concrete pad under all furnaces which are set on a wood floor (or use 2 layers of 1/2 inch dura rock or a 2 inch thickness of poured concrete).
7. Exhaust Fans: All bathroom, shower and powder room exhaust fans shall have insulated ductwork.
C. Energy Efficiency: Any and all references in this code (IMC), relating requirements of the International Energy Conservation Code to single-family dwellings and townhomes are hereby deleted.
D. Specific Amendments:
Section 306.3 Appliances In Attics
Attic furnaces are not permitted unless specifically approved by the building official.
Section 306.4 Appliances Under Floors
Furnaces in the crawlspace or other appliances under floors are not permitted unless specifically approved by the building official.
Section 602.3 Stud Cavity And Joist Space Plenums - Not Permitted
Delete this section in its entirety. Stud cavity and joist space plenums are not permitted.
Section 603.5.1 Gypsum Ducts - Not Permitted
Delete this section in its entirety. The use of gypsum board to form ducts is not permitted.
Section 910 Floor Furnaces - Not Permitted
Delete this section in its entirety. Floor furnaces are not permitted.
Section 922 Kerosene And Oil-Fired Stoves - Not Permitted
Delete this section in its entirety. Kerosene and oil- fired stoves are not permitted.
Chapter 15 Referenced Standards
All of the referenced standards listed in chapter 15 of the IMC 2012 edition are hereby adopted by the city of Prospect Heights.
Appendix A
Appendix A of the IMC 2012 edition is hereby adopted by the city of Prospect Heights.
(Ord. 0-19-06, 2-25-2019)