The following resources are often helpful for owners, construction leads and project managers:

American Society of Heating, Refrigeration, and Air-Conditioning Engineers (ASHRAE)
American Society of Plumbing Engineers (ASPE)
National Fire Protection Association (NFPA)
Association of Energy Engineers (AEE)
AABC American Commissioning Group (ACG)
International Ground Source Heat Pump Association (IGSHPA)
United Green Building Council (USGBC/GBCI)
EPA – Building Energy Star Certification