Constructing to the latest version of an American Society of Heating, Refrigeration and Air-Conditioning Engineers standard increases building efficiency 6 percent to 8 percent over the 2010 version, officials say.

The recently published 2013 update of ASHRAE Standard 90.1, “Energy Standard for Buildings Except Low-Rise Residential Buildings, includes 110 changes that the Pacific Northwest National Laboratories says can increase energy savings over 50 percent in certain situations.