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ASHRAE Membership

ASHRAE membership is open to any person associated with heating, ventilation, air conditioning or refrigeration. ASHRAE is unique because its membership is drawn from a wide range of disciplines relating to the HVAC&R field. Over 55,000 individuals from more than 100 nations belong to the Society.

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ASHRAE members earn 15% off publications. Hundreds of titles are available including the complete collection of ASHRAE Standards including 90.1, 62.1 and 189.1.
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Each month, all over the world, ASHRAE chapters convene for an informational program featuring a speaker or topic that is key to professionals in the industry. Meet with your peers and share ideas.
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Interpretations for Standard 90.1-1999

NOTE: All documents linked from this page are in PDF PDF-format.

Interpretation 90.1-1999-1 - February 4, 2000 (Ref. Section 9.3.2, relating to the exterior 

lighting power allowance)

Interpretation 90.1-1999-2 - February 6, 2000 (Ref. Section 6.2.1, relating to the efficiency requirements for HVAC equipment)

Interpretation 90.1-1999-3 - February 6, 2000 (Ref. water heater requirements in Section 7.2.2 and Table 7.2.2)

Interpretation 90.1-1999-4 - February 6, 2000 (Ref. to the requirements presented in ASHRAE/IESNA Standard 90.1-1999, Section, Additional Interior Lighting Power.)

Interpretation 90.1-1999-5 - February 7, 2000 (Ref. Section, Additions to Existing Buildings, and Section, Alterations to Existing Buildings

Interpretation 90.1-1999-6 - February 6, 2000 (Ref. Section 11.4.2, Building Envelope (Energy Cost Budget Method)

Interpretation 90.1-1999-7 - June 25, 2001 (Ref. Section Section, Vestibules)

Interpretation 90.1-1999-8 - January 25, 2004 (Ref. the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-1999, Section 3.2 Definitions and Section 6.3.3 Air System Design and Control, specifically relating to the definition of fan system energy demand (or fan system power))