Energy Standard Manual provides guidance for energy efficient building design.

Press Release Summary:

User's Manual to ANSI/ASHRAE/IES Standard 90.1-2010, Energy Standard for Buildings Except Low-Rise Residential Buildings, provides detailed guidance on how to apply ASHRAE/IES standard. Guide explains intentions behind provisions in standard and how they apply to buildings through written words as well as illustrations and example problems. Manual also identifies changes that have taken place since 2007 edition and uses calculations/examples to tell how new provisions apply.

Original Press Release:

User's Manual Provides Guidance on 2010 Energy Standard

ATLANTA - Detailed guidance on how to apply the latest ASHRAE/IES standard for the design of energy-efficient buildings is provided in a newly published user's manual.

The User's Manual to ANSI/ASHRAE/IES Standard 90.1-2010, Energy Standard for Buildings Except Low-Rise Residential Buildings, was published this week. The standard, which provides minimum requirements for the energy-efficient design of buildings except low-rise residential buildings, contains 109 addenda approved since the 2007 standard was published.

"The new User's 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," Steve Skalko, chair of the Standard 90.1 committee, said. "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."

Specific examples of how the User's Manual assists users in regard to the 2010 standard include:
  • Application of new requirements in the standard regarding data centers.
  • Application of new requirements for building envelopes including vestibules, continuous air barriers, skylights, daylighting controls and the use of dynamic glazing.
  • Explanation of new lighting power density requirements and application of revised lighting controls. In the standard, maximum allowed interior lighting power densities were lowered for most space types, additional occupant sensing controls and mandatory daylighting requirements are added for specific spaces and a new five-zone exterior lighting power density table has been added.
  • Explanation of how to apply new HVAC requirements, including higher equipment efficiencies, energy recovery provisions in more applications, economizers required in more climates and smaller system sizes and more energy-conserving controls.
  • Changes to modeling requirements (e.g. for U.S. Green Building Council LEED® certification) that were clarified and expanded.

    Since being developed in response to the energy crisis in the 1970s, Standard 90.1 has become the basis for building codes, and the standard for building design and construction throughout the United States.

    The cost of the 90.1-2010 User's Manual is $99 ($84, members). To order, contact ASHRAE Customer Service at 1-800-527-4723 (United States and Canada) or 404-636-8400 (worldwide) or visit

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