Significantly, the goal of ASHRAE Standard 90.1-2010 was to achieve 30 percent energy-cost savings compared to 90.1-2004 (aggregated across 16 building types in 17 climate zones). The 2010 version of ASHRAE Standard 90.1, Energy Standard for Buildings Except Low-Rise Residential Buildings, will be published this fall. Providing insights for today’s hvac system designerĪSHRAE Standard 90.1-2010 Updates to mechanical system mandatory and prescriptive requirements