History of the Illinois Energy Conservation Code

Public Act 093-0936 ( Energy Efficient Commercial Building Act) was signed into law in August, 2004. Thereby, an Illinois Energy Conservation Code for Commercial Buildings based on the 2000 International Energy Conservation Code (IECC), the American Society of Heating, Refrigeration and Air-conditioning Engineers (ASHRAE) 90.1-1999 Standard referenced therein, and the 2001 IECC Supplement to that Code, became effective April 8, 2006. On October 9, 2007 the Energy Efficient Building Act was revised to mandate the latest published edition, excluding supplements, of the IECC. As of August 18, 2009 the Illinois Energy Conservation Code for Commercial Buildings was the 2009 IECC. On August 28, 2009, Public Act 096-0778 requiring an energy code for residential buildings was signed into law. It became effective January 29, 2010, establishing the 2009 IECC as the first energy code for residential buildings in Illinois.

Illinois Capitol Building Senate Bill 3724 , signed by the Governor on August 17, 2012, amended the implementation date of the 2012 Illinois Energy Conservation Code to January 1, 2013. The Bill also lengthened the time the ILECAC and CDB have to review and adopt future published editions of the Code and make them effective. This allowed stakeholders more time for training and preparation to build, design, and enforce the future updated codes.

Proposed amendments were accepted by the ILECAC from July 1, 2014 to December 1, 2014. The ILECAC reviewed all properly submitted proposed amendments to the Code and, after deliberation, voted regarding the acceptance or rejection of these proposed amendments. The Council’s recommendations were then presented to the CDB. With CDB’s vote to accept the ILECAC’s recommendations, they were submitted to the Joint Committee on Administrative Rules (JCAR) for acceptance and implementation. JCAR Voted to accept CDB’s recommendations December 15, 2015.