According to the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE), more than 30 percent energy savings can be achieved using the recently published 2010 version of Standard 90.1 versus the 2004 standard.

ANSI/ASHRAE/IES Standard 90.1 2010, Energy Standard for Buildings Except Low-Rise Residential Buildings, which provides minimum requirements for the energy-efficient design of buildings except low-rise residential buildings, was published in November 2010. ASHRAE was awaiting the final results of analysis work from Pacific Northwest National Laboratories in support of the U.S. Department of Energy (DOE) Building Energy Codes Program on addenda included in the standard. The final figures were made available and announced at ASHRAE’s annual press breakfast in January.

Without plug loads, site-energy savings are 32.6 percent and energy-cost savings are 30.1 percent. Including plug loads, the site-energy savings are estimated at 25.5 percent and energy-cost savings are 24 percent.

“Three years ago, the 90.1 project committee set an aggressive goal of 30 percent savings for the 2010 version,” said Lynn G. Bellenger, ASHRAE president. “That the target was met and exceeded is a testament to the talent and dedication of the men and women from ASHRAE and the Illuminating Engineering Society (IES) who developed and evaluated over 119 change proposals to increase the stringency of our flagship energy conservation standard. At the 35th anniversary of Standard 90.1, it continues to lead the way in our industry as the minimum standard for energy efficiency.”

The standard is written in mandatory code language and offers code bodies the opportunity to make a significant improvement in the energy efficiency of new buildings, additions and major renovations.