Publications

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Document type: Technical Assistance report
Publication Date: June 2015
Page Focus: Adoption

The present analysis evaluates the cost-effectiveness of the latest 2015 edition of the IECC published in June 2014 (ICC 2014), over the 2012 Utah State Energy Code for the state of Utah1. The scope of work is limited to one- and two-family dwelling units, town-homes, and low-rise multifamily residential buildings covered by the residential provisions of the 2015 IECC. The new Energy Rating Index (ERI) path included in the 2015 IECC is not in the scope of this analysis due to the large variation in building configurations it allows

Document type: State-specific, Technical Assistance report
Publication Date: September 2009
Page Focus: Adoption

This analysis of residential energy code compares the requirements of the 2009 International Energy Conservation Code (IECC) with the residential code—or typical construction practice in the absence of a code—in most states as of June 2009. The results, which include estimated typical energy savings of updating each state’s code to the 2009 IECC, are provided in chapters specific to each state.

Several states have either not adopted a mandatory energy code or developed their own codes which have minimal or no connection to the IECC. The latter—including California, Florida, Oregon, and Washington— were not included in this analysis because the codes in these states would be difficult to appropriately compare to the 2009 IECC and most of these states have energy offices that have already assessed the IECC on their own.

Document type: State-specific, Technical Assistance report
Publication Date: May 2009
Page Focus: Adoption

An analysis by Pacific Northwest National Laboratory show that the 2009 International Energy Conservation Code (IECC) contains several major improvements in energy efficiency over the current Utah code, the 2006 IECC. The most notable changes are improved duct sealing and efficient lighting requirements. A limited analysis of these changes resulted in estimated savings of $168 to $188 for an average new house in Utah at recent fuel prices.