HVAC Breaking News

July 5, 2004: ANSI Denies Appeals Of Ventilation Standard Revision

ATLANTA - The American National Standards Institute (ANSI) Board of Standards Review has denied appeals of an addendum to the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) ventilation standard.

ANSI/ASHRAE Standard 62-2001, "Ventilation for Acceptable Indoor Air Quality," sets minimum ventilation rates and other requirements for commercial and institutional buildings. Addendum 62n was approved for publication at the Society's 2003 Annual Meeting. Six appeals were filed and later denied by ASHRAE.

The ANSI Board of Standards Review voted to deny all appeals made to that organization, thereby upholding its earlier approval of the addendum.

The addendum revises the standard's ventilation rate procedure used to determine design ventilation rates. According to David Butler, P.E., committee chair, the procedure now is more straightforward, allowing designers to determine rates and reduce the potential for overventilation in some densely occupied spaces. Furthermore, the standard is now focused on minimum requirements.

In recognition of the fact that air pollutants are generated by building occupant activities and by the building contents, the addendum bases ventilation requirements on the number of people a space is expected to hold, as well as the space's floor area, Butler said. The "additivity" procedure is used to calculate minimum outdoor ventilation requirements for a building ventilation system.

For example, in an office building, the procedure is used to determine the outdoor air requirement for each space type (offices, conference rooms, corridors, etc.), which are in turn used to determine the amount of outdoor air intake required at the air handler.

The existing procedure, issued in 1989, contains a number of requirements that are difficult for designers to comply with and that do not allow designers to explicitly account for occupant density in a space, Butler said.

To make application of the calculation methods easier for users, a spreadsheet, 62n.VRP.xls, was developed. It can be obtained under the SSPC62.1 directory at ftp.ashrae.org. Addendum 62n can be downloaded at no cost via the "Standards Addenda Index" shortcut at www.ashrae.org.

Publication date: 07/05/2004

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

Recent Articles by Greg Mazurkiewicz

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



Image Galleries

2015 HARDI Fly-In

Highlights from HARDI's Congressional Fly-In in Washington, D.C. Post date: May 28, 2015.


NEWSMakers: Clint Schreck

Clint Schreck, general manager, Columbus Worthington Air, Columbus, Ohio, discusses winning Angie’s List Super Service Award, how to handle online reviews, and much more.

More Podcasts


NEWS 06-01-15 cover

2015 June 1

Check out the weekly edition of The NEWS today!

Table Of Contents Subscribe


The EPA has approved several hydrocarbon (HC) refrigerants for HVACR applications. Do you support the use of HCs?
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 ACHRNews.com. Get full access to the latest features, Extra Edition, and more.


facebook icontwitter iconyoutube iconLinkedIn i con