ANSI/ASHRAE/IES 90.1-2022, Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings

 The ANSI/ASHRAE/IES 90.1-2022, Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings provides the minimum requirements for energy-efficient design of most sites and buildings, except low-rise residential buildings. It offers, in detail, the minimum energy efficiency requirements for design and construction of new sites and buildings and their systems, new portions of buildings and their systems, and new systems and equipment in existing buildings, as well as criteria for determining compliance with these requirements. It is an indispensable reference for engineers and other professionals involved in design of buildings, sites, and building systems. The 2022 edition of Standard 90.1 incorporates over 80 addenda to the 2019 edition. Major additions appearing for the first time in a minimum-efficiency U.S. model energy standard or code at the national level include: A minimum prescriptive requirement for on-site renewable energy An optional Mechanical System Performance Path allowing HVAC system efficiency tradeoffs based on the new total system performance ratio (TSPR) metric New requirements to address the impacts of thermal bridging Other highlights include: An expanded scope to include sites as well as buildings New energy credit requirements for a customized approach to improving energy efficiency New informative guidance for using carbon emissions, site energy, or source energy as alternative performance metrics to the current energy cost metric Significant efficiency increases in IEER for commercial rooftops and a new SEER2/HSPF2 metric for <65K sized air-cooled heat pumps.

Key aspects:

• A minimum prescriptive requirement for on-site renewable energy
• An optional Mechanical System Performance Path allowing HVAC system efficiency tradeoffs based on the new total system performance ratio (TSPR) metric
• New requirements to address the impacts of thermal bridging.

Highlights:

• An expanded scope to include sites as well as buildings
• New energy credit requirements for a customized approach to improving energy efficiency
• New informative guidance for using carbon emissions, site energy, or source energy as alternative performance metrics to the current energy cost metric
• Significant efficiency increases in IEER for commercial rooftops and a new SEER2/HSPF2 metric for &lt;65K sized air-cooled heat pumps.

About SSPC

The ASHRAE Standing Standards Project Committee 90.1 (SSPC 90.1) is a multidisciplinary group of professionals responsible for developing and maintaining the ANSI/ASHRAE/IES Standard 90.1, one of the most widely used energy codes for commercial buildings.

The committee is composed of engineers, architects, lighting specialists, energy modelers, code officials, utility representatives, manufacturers, and sustainability experts from across the building industry. Its primary mission is to ensure that the 90.1 standard reflects current technologies, energy performance goals, and real-world building practices.

Other Works:

ASHRAE Standard Safety Standard for Refrigeration Systems 15-2022 & 34-2022