August 7 Deadline for Standards Comments

July 3, 2000
/ Print / Reprints /
/ Text Size+
The public review period for four American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) standards ends August 7. Up for review are Standard 62-1999 (“Ventilation for Acceptable Indoor Air Quality”), Standard 34-1992 (“Number Designation and Safety Classification of Refrigerants”), Standard 34-1997 (“Designation and Safety Classification of Refrigerants”), and Standard 90.1-1999 (“Energy Standard for Buildings except Low Rise Residential Buildings”).

Standard 62, which is designed to set minimum ventilation rates and other requirements for commercial and institutional buildings, has three addenda up for public review. They are:

Addendum V, which adds requirements to ensure that air distribution systems are capable of delivering outdoor air to occupied spaces. The addendum addresses balancing, plenum mixing systems, exhaust duct location, and documentation.

Addendum W, which defines performance criteria for air stream surfaces in ventilation system equipment, duct, and plenums.

Addendum X, which clarifies and adds requirements to ensure that the building envelope does not contribute to IAQ problems. The addendum also calls for design features to minimize attached parking garage vehicle exhaust from entering occupied spaces.

The proposed addendum to Standard 34-1992 is Addedum P, which specifies the data required to determine the flammability classification of a refrigerant. Specific instructions for testing refrigerant blends are included.

The proposed addendum to Standard 34-1997 is Addendum S, which reassigns the safety classification of R-245fa from A1 to B1. This addendum was previously released from the 1992 standard.

Finally, ASHRAE recently released the first proposed changes to Standard 90.1. The 29 addenda proposed are organized by design discipline, and consist of mostly minor editorial changes, according to Lawrence Spielvogel, chair of the standard committee. One such addendum updates the referenced standard for chiller ratings from the previous Air-Conditioning and Refrigeration Institute (ARI) Standard 550-92 to the new ARI Standard 550/590-1998. ASHRAE believes this update allows for better representation of part-load chiller performance.

The proposed addenda for the four standards can be reviewed on ASHRAE’s website,


Did you enjoy this article? Click here to subscribe to The NEWS Magazine

You must login or register in order to post a comment.



Image Galleries

2014 World Energy Engineering Congress

Scenes from the 2014 World Energy Engineering Congress in Washington, D.C.


NEWSMakers: Kari Arfstrom

Kari Arfstrom, executive director of the HVACR Workforce Development Foundation, talks about the upcoming HVACR & Mechanical Conference. Posted on Jan. 23.

More Podcasts


NEWS 01-26-15 cover

2015 January 26

Check out the weekly edition of The NEWS today!

Table Of Contents Subscribe

Regional Standards

With regional standards for a/c equipment going into effect in 2015, how do you think it will impact the industry?
View Results Poll Archive


2015 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

More Products

Clear Seas Research


Clear Seas ResearchWith access to over one million professionals and more than 60 industry-specific publications, Clear Seas Research offers relevant insights from those who know your industry best. Let us customize a market research solution that exceeds your marketing goals.


Magazine image
Register today for complete access to Get full access to the latest features, Extra Edition, and more.


facebook icontwitter iconyoutube iconLinkedIn i con