ashrae 62.1-99 to 62.1-2007

Avkash Patel

LEEDuser Basic Member

32 thumbs up

November 14, 2010

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Avkash Patel

LEEDuser Basic Member

32 thumbs up

Tue, 12/21/2010 - 20:48

I was looking at the standard and it states that i only need 5 cfm (2.5 L/s) per person as it Applies to spaces where primarily adults are involved in fairly passive activities similar to sedentary office work. My original system meets 5 cfm per person but my original documentation states that its under Ashrae 62.1-1999 not 2007. Will this be a problem?

Jenny Carney

Vice President

WSP

LEEDuser Expert

436 thumbs up

Fri, 01/07/2011 - 19:20

Kash, It does sound like your building will likely be compliant based on having been designed to a relatively recent ventilation standard. But, your original documentation won't necessarily come into play. Rather than using default values for occupancy as in the design phase, EBOM projects must recalculate OA requirements per ASHRAE based on the actual occupancy and space usage (hopefully these values won't be too different in a newish building, but reality does tend to diverge from design assumptions and conditions pretty quickly). So in any event, you need to do the calcs per the 2007 standard with the current info. Similarly, and T&B work done after construction can only be used to verify delivered OA rates if you apply under EBOM within 2 years of when those tests were conducted.