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Can LEED 2009 projects elect to follow ASHRAE 62.1-2010 for this prerequisite?

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NC-2009 IEQp1:Minimum IAQ Performance

local code IEQ requirements

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Mike W.
LEEDuser Basic Member
3 thumbs up

In New York the local code does not follow IBC or ASHRAE 62.1. It requires 20cfm/person and 0cfm/sf. How do I go about proving to USGBC that the ventilation levels are adeqaute, when all the template references is 62.1 and the 62MZcalc?

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Roger Chang
Principal, Energy and Engineering Leader
DLR Group | Westlake Reed Leskosky
LEEDuser Expert
267 thumbs up

Fri, 12/09/2011 - 14:17

You'll want to use all of the ASHRAE 62.1 calculation methods and then compare the ventilation rates to NYC codes on a zone and system level. The NYC code rates tend to end up being higher than ASHRAE 62.1 rates. For NYC code, application of 403.3.2 (multiple-spaces approach) will result in high system-level ventilation rates.

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