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ANSI Rejects Final Appeal to Revised Ventilation Standard
Oct 22, 2004
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The American National Standards Institute (ANSI) Appeals Board has rejected a final appeal 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 ASHRAE's 2003 Annual Meeting; however, six appeals were filed and later denied by the engineering organization.

The ANSI Appeals Board's decision upholds a decision made earlier this year by its Board of Standards Review, which voted to deny all appeals made to ANSI, thereby upholding its earlier approval of the addendum.

The addendum specifies the determination of design ventilation rate used for application of the ventilation rate procedure. The procedure specifies ventilation rates that can be easily measured for compliance verification and allows designers to determine appropriate rates and reduce the potential for overventilation in some densely occupied spaces, according to David Butler, P.E., committee chair. Furthermore, ASHRAE contents that the standard is now focused on minimum requirements and is written in mandatory, enforceable language.

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, Mr. Butler said. The "additivity" procedure is used to calculate minimum outdoor ventilation requirements for a building ventilation system.

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