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Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

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 Tennessee, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

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: Analysis, Reports and Studies
Publication Date: April 2012
Page Focus: Code Development

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.

Document type: Analysis
Publication Date: February 2015
Page Focus: Code Development

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. These reports were originally published in October 2015, and updated in February 2016 to update numbers reported in certain results tables.

Document type: State-specific
Publication Date:
Page Focus: Adoption

The Tennessee State Fire Marshal’s Office will implement enforcement of adopted energy codes for new building project submissions as of Friday, July 1, 2011. The energy codes adopted are:

  • All buildings other than state buildings: The 2006 International Energy Conservation Code
  • State buildings: ASHRAE Standard 90.1-2007.
Document type: State-specific
Publication Date: April 2015
Page Focus: Compliance

The State of Tennessee, Department of Commerce and Insurance, Division of Fire Prevention, previously sent a letter, dated July 18, 2013, to the U.S., Department of Energy certifying that it had adopted the 2006 International Energy Conservation Code (IECC) for one and two family dwellings and townhouses and non-State owned commercial buildings, and the American Society of Heating Refrigerating and Air-Conditioning Engineers (ASHRAE) Standard 90.1-2007 for State buildings.

In that letter, the State of Tennessee sought an extension until March 31, 2015, to review and consider adoption of updated editions of the IECC and ASHRAE standards to comply with the certification requirements of Section 304(C) of the Energy Policy and Conservation Act (EPCA).  However, due to the current political environment and coinciding circumstances, the State of Tennessee requests additional time, specifically December 1, 2015, in which to adopt the 2009 IECC and ASHRAE 90.1-2010.