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ASHRAE Publishes 2008 Version of BACnet Standard

2009 January 29
by admin; 14,594 views

ATLANTA — The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) announced that it has published the 2008 version of the BACnet standard. ANSI/ASHRAE Standard 135-2008, BACnet® — A Data Communication Protocol for Building Automation and Control Networks, allows building equipment and systems manufactured by different companies to work together. The open, consensus developed standard for building controls includes seven addenda approved since the 2004 standard was published.

ashrae logo“The 2008 version of the standard incorporates many years of work by the BACnet committee,” said immediate past chair Bill Swan. “This includes material first published a couple of months ago. It replaces the 2004 version as the standard for BACnet technical and specification efforts.”

The standard contains new guidance related to the Load Control object, an extension to reduce a building’s energy consumption on demand — a key element of the integration of energy utilities and buildings to reduce or eliminate brownouts and blackouts from energy grid overload. It also covers:

  • The Access Door object, the first of the extensions to fully support physical
    access control.
  • Improvements in requirements on BACnet devices.
  • New capabilities such as BACnet Web Services which, among other things, are
    being considered for energy utility-building communications.
  • A standardized and interoperable means to record alarms

The cost of ANSI/ASHRAE Standard 135-2008, BACnet® — A Data Communication Protocol for Building Automation and Control Networks, is $119 ($99 ASHRAE members). To order, contact
ASHRAE Customer Service at 800.527.4723 (United States and Canada) or 404.636.8400 (worldwide), fax 404.321.5478, or visit

ASHRAE, founded in 1894, is an international organization of some 50,000 persons. ASHRAE fulfills its mission of advancing heating, ventilation, air conditioning and refrigeration to serve humanity and promote a sustainable world through research, standards writing, publishing and continuing education.

One Response leave one →
  1. May 9, 2009

    About three years ago I decided to build my own home instead of hiring the expensive contractors. It was actually quite easy, even with my limited knowledge of construction. I am just thankful that I had the bucket truck handy because my pick up couldn’t cut it.

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