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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