The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) develops ANSI standards that are updated every three years. However, some standards are on continuous maintenance, meaning that these standards are updated continuously through addenda to the existing standard.
ASHRAE 90.1 and 189.1 standards can be adopted independently, but in most cases are adopted as an inclusion in the ICC energy codes. ASHRAE 90.2 has never been adopted by any local jurisdiction.
Participation in the development process and distribution of committee correspondence is limited to committee and subcommittee members with participation by others at the discretion of the chair.
NMHC/NAA track and participate in the development of the following ASHRAE standards:
ASHRAE Standards and Development Timelines
NMHC/NAA ASHRAE Committee Appointments