Residential buildings consume 22 percent of U.S. primary energy use and produce 21 percent of U.S. carbon dioxide emissions, said CPI, so the ultimate potential impact of building energy codes is substantial. Most states have adopted U.S. Department of Energy (DOE)-recommended model codes, first set in 1992 and subsequently updated several times; others have written their own standards. Seven U.S. states — Alabama, Mississippi, Missouri, North Dakota, Oklahoma, South Dakota, and Wyoming — do not have mandatory building energy codes. Other states such as New Mexico and Maine are considering reverting to less stringent codes.
CPI’s analysis, which reviewed states’ energy use from 1986 to 2008, found that states adopting federal codes have achieved an approximately 10 percent reduction in household energy use, and a 16 percent reduction in household greenhouse gas emissions.
“Engineering models suggest that U.S. building codes should deliver energy savings; we now have solid evidence that they do,” said Kath Rowley, director of Climate Policy Initiative’s San Francisco office. “States looking for ways to reduce energy use should take note.”
For more information, visit www.climatepolicyinitiative.org.
Publication date: 09/19/2011