: Introduced more stringent equipment efficiencies and specific design requirements for hydronics and airside systems. It also mandated variable speed pump control for many chilled water systems.
: Updated Lighting Power Density (LPD) allowances and introduced more detailed methods for determining power allowances, such as the Space-by-Space Method. ashrae 90.1-2010
: Increased requirements for insulation and established new criteria for air barriers and fenestration (windows and doors). For example, it capped the maximum glazed area at 50% of the gross wall area and limited skylights to 5% of the roof area. : Increased requirements for insulation and established new
, titled "Energy Standard for Buildings Except Low-Rise Residential Buildings," was a landmark update in building energy efficiency, providing the minimum requirements for the design and construction of new commercial buildings and their systems. Core Impact and Efficiency Gains Core Impact and Efficiency Gains In the United
In the United States, Standard 90.1-2010 serves as a critical legal benchmark: Standard 90.1 - ASHRAE