This report described the results of a two-year Northwest Energy Efficiency Alliance study intended to improve understanding of the new commercial building stock in the Pacific Northwest region. It provided a new regional baseline for practices in commercial buildings constructed between 2002 and 2004 and compared those practices with previous baseline and code compliance studies conducted from 1996 to 1998. The study also looked at changes in design professionals' attitudes toward energy efficiency across the same periods.
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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 Washington, using the 2006 IECC as the baseline code.
Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).
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 the Northwest Energy Efficiency Alliance that "characterize ssingle-family residential new construction using a representative sample of buildings constructed in 2004 and 2005...The results will provide a baseline for ENERGY STAR® New Homes Northwest specifications."
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.
In compliance with Title III of the Energy Conservation and Production Act (ECPA) of 1976, as amended, this is to certify that the State of Washington has adopted the 2012 Edition, Washington State Energy Code, which meets or exceeds the 2012 version of the International Energy Conservation Code (IECC) for low-rise residential buildings, as well as ASHRAE 90.1-2010 for nonresidential buildings.