According to Ashrae 90.1-2007 G3.1.1.d there should be a fan flow limitation for lab spaces in the baseline model during unoccupied hours.
"For Lab spaces with a minimum of 5000 cfm of exhaust, use system type 5 or 7 that reduce exhaust and makeup air volume to 50% of design values during unoccupied periods"
What if the design uses a fan flow limitation of 10% of design values for lab spaces ? Can this more restrictive flow limitation be used for the proposed model. Or should the flow limitation of 50% be used, which is identical to baseline model.
You rely on LEEDuser. Can we rely on you?
LEEDuser is supported by our premium members, not by advertisers.
Go premium for
Ante Vulin
Sustainability ManagerYR&G
80 thumbs up
September 28, 2011 - 4:18 pm
Heinrich,
I believe that you can use a 10% value in your proposed case, in the same way that heat recovery that exceeds the 50% minimum can be modeled.