The manual for American Society of Heating, Refrigeration and Air-Conditioning Engineers standard 90.1 has 109 addenda added since the 2007 version of the efficiency standard was released.

ASHRAE has published a new user guide for one of its most used standards.

The manual for American Society of Heating, Refrigeration and Air-Conditioning Engineers standard 90.1, “Energy Standard for Buildings Except Low-Rise Residential Buildings,” has 109 addenda added since the 2007 version of the efficiency standard was released.

“The new users manual is a very useful resource because it helps guide practitioners in by explaining the intent of provisions in the standard and how they apply to buildings through not only written word but also illustrations and example problems,” said Steve Skalko, chairman of the standard 90.1 committee. “The latest edition of the manual is especially valuable because it specifically identifies what changes have taken place since the 2007 edition and through use of calculations and examples tells how the new provisions apply.”

Additions include new requirements for data centers and clarifications for “green” buildings.

For ordering information, visit the society’s online bookstore .