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Why Join ASHRAE

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. Approximately 51,000 individuals from more than 100 nations belong to the Society.

Discounts on Publications

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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Develop Leadership Skills

When you join ASHRAE, you are making an investment in yourself. When you become active in the Society by giving your time and sharing your knowledge, you get even more out of that investment.

Network with Industry Professionals

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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Standards, Research & Technology
 

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 9.3.1.2, Additional Interior Lighting Power.)

Interpretation 90.1-1999-5 - February 7, 2000 (Ref. Section 4.1.2.1, Additions to Existing Buildings, and Section 4.1.2.2, 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 5.2.3.4, 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))