Login

Email   Password
  
 

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.
Click here for information on joining or to join ASHRAE

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.
 
 
Need technical info? Search ASHRAE's Bookstore >
 
 
Standards, Research & Technology
 

Addenda to Standard 34-2004

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

(These descriptions may not be complete and are provided for information only.)

Addendum h (adds a designation of R-422D to the blend R-125/134a/600a (65.1/31.5/3.4) with tolerances of (+0.9,-1.1/ ±1.0/+0.1,-0.4) and a safety classification of A1.)

Addendum g (This addendum adds a column to Tables 1 and 2 titled “Highly Toxic or Toxic,” with each refrigerant designated as highly toxic, toxic (as defined by the International Fire Code, Uniform Fire Code, and OSHA), or neither (for refrigerants less toxic than as defined above), adds definitions for these terms, and updates the references.)

Addendum i (This addendum adds a designation of R-426A to the blend R-125/134a/600a/601a (5.1/93.0/1.3/0.6) with tolerances of (±1.0/±1.0/+0.1,-0.2/+0.1,-0.2) and a safety classification of A1.)