1. 1) Zones for insulation/building perimeter requirements shall consist of the counties listed here.

   Zone 1 includes the following counties:
   Boone	Ford	Kane	Lee	Ogle	Tazewell
   Bureau	Grundy	Kankakee	Livingston	Peoria	Warren
   Carroll	Henderson	Kendall	Marshall	Putnam	Whiteside
   Cook	Henry	Knox	McHenry	Rock Island	Will
   DeKalb	Iroquois	Lake	McLean	Stark	Winnebago
   DuPage	JoDaviess	LaSalle	Mercer	Stephenson	Woodford

   Zone 2 includes the following counties:
   Adams	Clark	Effingham	Jersey	McDonough	Pike
   Bond	Coles	Fayette	Logan	Menard	Sangamon
   Brown	Crawford	Fulton	Macon	Montgomery	Schuyler
   Calhoun	Cumberland	Greene	Macoupin	Morgan	Scott
   Cass	DeWitt	Hancock	Madison	Moultrie	Shelby
   Champaign	Douglas	Jasper	Mason	Piatt	Vermilion
   Christian	Edgar

   Zone 3 includes the following counties:
   Alexander	Gallatin	Johnson	Perry	St. Clair	Washington
   Clay	Hamilton	Lawrence	Pope	Saline	Wayne
   Clinton	Hardin	Marion	Pulaski	Union	White
   Edwards	Jackson	Massac	Randolph	Wabash	Williamson
   Franklin	Jefferson	Monroe	Richland

2. 2) The following minimum building perimeter insulation R values shall be provided:

   	Roof	Walls	Floors
   Zone 1	R-20	R-17	R-19
   Zone 2	R-18	R-17	R-19
   Zone 3	R-15	R-12	R-11

3. 3) All windows shall be glazed with double glazed insulating glass. All exterior windows and door frames shall be constructed of non-cold conducting materials such as wood or metal with a thermal break.

(Source: Amended at 12 Ill. Reg. 15080, effective October 1, 1988)