1 As a consequence, energy usage in buildings (both residential and commercial) is receiving significant attention from federal, state, and local government agencies. For more information and to stay up-to-date on ASHRAE, visit account for roughly 40 percent of the energy consumption and 40 percent of the carbon dioxide emissions in the United States. As an industry leader in research, standards writing, publishing, certification and continuing education, ASHRAE and its members are dedicated to promoting a healthy and sustainable built environment for all, through strategic partnerships with organizations in the HVAC&R community and across related industries.
energy crisis.įounded in 1894, ASHRAE is a global professional society committed to serve humanity by advancing the arts and sciences of heating ventilation, air conditioning, refrigeration and their allied fields. The 2019 version is the 11th edition published since the original standard was first published in 1975 during the U.S. Standard 90.1 has been a benchmark for the commercial building energy codes in the United States and a key basis for codes and standards around the world.
Extensive updates were added to the rules for lighting modeling.Īlso new to the standard is use of the new fan energy index (FEI) as the metric for efficiency provisions for commercial and industrial fans and blowers. Building performance factors in Section 4 were updated.īoth Compliance Paths: Clearer and more specific rules were added related to how renewables are treated. Clarification was added for how plant and coil sizing should be performed. More specific baseline rules were set for infiltration modeling. Rules were added for modeling the impact of automatic receptacle controls. Explicit heating and cooling COPs were provided without fan for the baseline packaged cooling equipment. Performance Rating Method: Appendix G rules and the corresponding baseline efficiency requirement were clarified. The baseline was set for on-site electricity generation systems. Pump definitions, requirements and efficiency tables are included in the standard for the first time.Įnergy Cost Budget Method: Numerous changes were made to ensure continuity. Mechanical: New requirements were defined to allow designers the option to use ASHRAE Standard 90.4 instead of ASHRAE/IES Standard 90.1 requirements in computer rooms that have an IT equipment load larger than 10 kW. Daylight-responsive requirements and side-lighting requirements were updated. Lighting control requirements for parking garages were updated.
A new simplified method for lighting (new Section 9.2) was added. The model is more representative of real-world conditions with the inclusion of updated IES recommendations. Lighting: Lighting power allowances for the Space-by-Space Method and the Building Area Method were modified. Changes to the vestibule section refined the exceptions and added a new option and associated criteria for using air curtains. The air leakage section was revised to clarify compliance. Minimum criteria for SHGC and U-factor were upgraded across all climate zones. Section 4.2.5, “Verification, Testing, and Commissioning,” was greatly expanded and requirements were outlined for commissioning in accordance with ASHRAE/IES Standard 202.īuilding Envelope: For vertical fenestration, the categories of “nonmetal framed” and “metal framed” products were combined. “This new version focuses on energy-saving measures which we hope will reward designs for achieving energy cost levels above the standard minimum and result in more efficient buildings and more innovative solutions.”Īdministration and Enforcement: Commissioning requirements were added to the standard for the first time. “The goal of the 2019 version of 90.1 was to provide clearer guidance for exceeding efficiency goals,” said Drake Erbe, chair of the Standard 90.1 committee. ANSI/ASHRAE/IES Standard 90.1-2019, Energy Efficiency Standard for Buildings Except Low-Rise Residential Buildings, contains more than 100 changes from the 2016 version, including numerous energy-saving measures. ASHRAE has released an expanded, revised version of a well-known energy standard.