April 2008
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ASHRAE revises energy standard

ASHRAE and the Illuminating Engineering Society of North America (IESNA) have increased the minimum required prescriptive R-value for roof and wall insulation levels 33 percent from R15 to R20 in the 2007 version of ANSI/ASHRAE/IESNA Standard 90.1, "Energy Standard for Buildings Except Low-Rise Residential Buildings." The increased insulation values apply to all commercial high-rise residential buildings covered by Standard 90.1.

"ASHRAE is to be commended for establishing a new benchmark for building energy efficiency," says Jared Blum, the Polyisocyanurate Insulation Manufacturers Association's president. "According to the U.S. Department of Energy, commercial buildings and homes account for 40 percent of the energy consumed in the U.S. The increased values establish a new national standard minimum against which all codes can be compared and pave the way for buildings with improved efficiency and a decreased carbon footprint."

The standard is available for purchase by contacting ASHRAE Customer Service at (800) 527-4723 or visiting



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