Our building energy model s.f.(table eap2-1) 74,000+/- does not match the gross building s.f. reported in 1.1A 94,000+/-. The difference is approximately 20,000 s.f. and is due to wall thickness and chases in a 4 level builidng. The LEED reviewer is stating that the two s.f. numbers must match - is there guidance in the LEED credit or ASHRAE 90.1 that indicates how this s.f. must be treated?
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Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
October 22, 2012 - 7:36 pm
A gross to net difference of over 20% is extremely high. Normal range is under 10%. The energy model should be modeling gross sf overall and net for things like lighting.
If your project does indeed have such a difference I would suggest you provide a detailed narrative explaining it, show your calculations and perhaps even provide drawings to back up your claim.