[Bldg-sim] Appendix G. laboratory spaces with minimum 5000 cfm exhaust

Kevin Kyte KKyte at watts-ae.com
Wed Aug 18 13:09:35 PDT 2010


The answer is in the question, "For laboratory spaces..."


From: Bishop, Bill [mailto:wbishop at pathfinder-ea.com]
Sent: Wednesday, August 18, 2010 2:42 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Appendix G. laboratory spaces with minimum 5000 cfm exhaust

For baseline HVAC system type, ASHRAE 90.1-2007 has the following exception (G3.1.1 d.):
"For laboratory spaces with a minimum of 5000 cfm of exhaust, use system type 5 or 7 that reduce the exhaust or makeup air volume to 50% of design values during unoccupied periods."
Similarly, "systems serving laboratories with exhaust rates of 5000 cfm or greater" are excepted from the baseline energy recovery requirement (G3.1.2.10 h.).

When applying this exception, is it 5000 cfm per space? Per floor? Per building? Per system?


William Bishop, PE, BEMP, LEED(r) AP | Pathfinder Engineers & Architects LLP
Mechanical Engineer

134 South Fitzhugh Street
Rochester, NY 14608
T: (585) 325-6004 Ext. 114
F: (585) 325-6005
wbishop at pathfinder-ea.com
P Sustainability - less is more.

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