Standards & guidance · Defined
ASHRAE 90.1 — Energy standard
An energy-efficiency standard widely used as a basis or compliance path for commercial building energy requirements.
Standards references reviewed September 15, 2026. These summaries explain purpose, not the full standard. Confirm the edition required by your contract, program, and jurisdiction; publication of a newer edition does not automatically change local requirements.
Why it matters
The adopted edition, building applicability, amendments, and selected compliance path govern a project. The most recently published edition is not automatically the locally enforceable one.
In practice
A project example
A design review checks the edition referenced by the jurisdiction rather than substituting a newer publication without confirmation.
Technical references
General educational guidance from KOW Building Consultants. Examples are illustrative, not project records. The applicable contract, standard, program, and jurisdiction control the requirements for a specific assignment.