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
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Moving to the ANSI/ASHRAE/IES Standard 90.1‐2013 version from the Base Code (90.1‐2010) is cost‐effective overall for the combined commercial buildings in the State of Utah.
The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.
This set of IECC Prototype Building Models is for the state of Utah, using the 2006 IECC as the baseline code.
Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).
This nationwide analysis of commercial energy code compares ASHRAE Standard 90.1-2007 with the commercial code in each state as of June 2009. The results are provided in chapters specific to each state.
States with unique energy codes were not included in the analysis because the codes in these states would be difficult to appropriately compare to ASHRAE Standard 90.1 and most of these states have energy offices that routinely assess their codes against the model codes. In states with codes prior to and including the 2000 IECC or Standard 90.1-1999, those states with no statewide energy code, and home rule states which did not specifically request that another code be used, Standard 90.1-1999 was used as the baseline for comparison.
Three DOE Benchmark buildings were used for the simulation used in this analysis: a medium office building (53,600 ft2), a mid-rise apartment building (33,700 ft2), and a non-refrigerated warehouse (49,500 ft2...
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.
A study prepared for E-Star Colorado, the Colorado Governor's Office of Energy Management and Conservation, and The Energy Foundation in order to analyze potential energy savings. The conclusion of the report recommends "adopting and enforcing up-to-date energy codes...and surpassing the energy performance specified by [these] codes."
House Bill 202, which was passed during the 2013 Legislative Session, adopted a hybrid version of the 2006, 2009 and 2012 International Energy Conservation Code (IECC) in Utah (“Utah 2012”) for residential buildings and the complete 2012 IECC for commercial buildings. The Utah 2012 and IECC 2012 commercial provisions take effect after the Uniform Building Code Commission certifies in writing to the Utah Legislature that the U.S. Department of Energy (DOE) has adopted a version of REScheck software that can be used to verify compliance with the provisions in H.B. 202.
A report conducted by the Southwest Energy Efficiency Project (SWEEP) that "reviews state and utility programs aimed at stimulating the construction of highly energy-efficient new homes in the states of Arizona, Colorado, Nevada, and Utah."
Pacific Northwest National Laboratory (PNNL) conducted a series of cost effectiveness analyses for the U.S. Department of Energy (DOE), covering the 2009 and 2012 editions of the International Energy Conservation Code (IECC) for new single and multifamily homes. The evaluations were performed against a 2006 IECC baseline, taking state-specific code amendments into consideration. These reports outline the results of these analyses, including a National Cost Analysis and Cost Analyses for selected states.
These analyses evaluate the cost-effectiveness of the prescriptive path of the 2015 edition of the International Energy Conservation Code (IECC), relative to the 2006 IECC for all 50 states and the District of Columbia. The analysis covers one- and two-family dwelling units, town-homes, and low-rise multifamily residential buildings covered by the residential provisions of the 2015 IECC.
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.
2012 IECC Chapter 4, annotated with Utah's amendments.
This Guide is designed to assist state and local code jurisdictions in achieving statewide compliance with the 2006 International Energy Conservation Code (IECC) for residential buildings and ASHRAE Standard 90.1-2007 for commercial buildings.