We are planning to use local code to meet the prerequisite. There are a few space types for which the local requirement is less stringent. However, ventilation calculations shows that local code requires remarkably more outdoor air for the whole building than ASHRAE 62.1. Should we still meet the ASHRAE outdoor air requirements in those few space types?

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Michael Brown

Energy Analyst & Energy Systems Design Engineer

HKS

LEEDuser Expert

7 thumbs up

Fri, 01/20/2017 - 15:26

Assuming that those spaces are apart of the same zone, then as long as you meet the overall minimum ventilation rate provide by the HVAC system serving that zone(s) you will comply with the requirements of 62.1. I would highly recommend that you preform outdoor air calculations using the LEED Minimum Indoor Air Quality Performance Calculator referenced here: http://www.usgbc.org/resources/minimum-indoor-air-quality-performance-calculator (this can be used for LEEDv2009 or LEEDv4 projects) Alternatively, this could also be provided from energy model outputs for ventilation calculations for verification.

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