Using the 2010 version of ASHRAE Standard 90.1 instead of the 2004 standard can save more than 30% in energy costs, according to the technical society.
The updated version of 90.1, Energy Standard for Buildings Except Low-Rise Residential Buildings, offers 32.6% site energy savings and 30.1% energy cost savings without plug loads, according to analysis work performed by Pacific Northwest National Laboratories in support of DOE’s Building Energy Codes Program. Including plug loads, site energy savings are estimated at 25.5% and energy cost savings are estimated at 24%.
The standard’s scope was expanded to cover receptacles and process loads, including data centers, which allows future addenda to address energy-consuming equipment and systems that were previously outside its scope.
Other changes include continuous air barrier and cool/high albedo roof requirements, lower interior lighting power densities, occupancy sensing, daylighting requirements, and more efficient equipment.
