ASHRAE 189.3-2025 ✓ Most Recent

ANSI/ASHRAE/ASHE Standard 189.3 provides minimum requirements for the siting, design, construction, and operation of high-performance, sustainable health care facilities to

• Reduce emissions, enhance occupant health and comfort, conserve water, protect local biodiversity and ecosystems services, promote sustainable and regenerative materials cycles, and enhance resilience; and
• Support the goal of development that meets the needs of the present without compromising the ability of future generations to meet their own needs, including decarbonization of the building environment.

 

The 2025 edition of Standard 189.3 is an extensive update that includes changes to address carbon emissions, encourage the design of engineered plumbing systems, and expand lighting power density allowances for spaces in requirements specific to health care facilities. For a full list of changes, click the preview link below the cover image at the top of this page.