Three addenda to ASHRAE's BACnet® have been approved for publication.

Three addenda to the American Society of Heating, Refrigerating and Air-Conditioning Engineers' (ASHRAE) BACnet® have been approved for publication.

ANSI/ASHRAE Standard 135-2001, BACnet--A Data Communication Protocol for Building Automation and Control Networks, is the only open, consensus-developed standard in the building controls industry.