In one of our projects, we've 100% naturally ventilated school building, which will have ceiling fans for comfort, a total area of approx 80,000 sqft, Ground + 2 floors. As per the LEED V 2009, we understand even if no cooling systems has been specified, the proposed design must include cooling system modeled identically to baseline design cooling system. Should our baseline case be system - 6 and the proposed case should also consider the same system? And how should we account for the ceiling fans?
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Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
December 9, 2013 - 3:05 pm
Yes technically that is what you are supposed to do. You can also modify the cooling temperature set points so that the system will not operate in both models. If you wish to claim energy savings related to natural ventilation see the appendix in the Advanced Energy Modeling Guide for LEED.
The ceiling fans would be treated as a plug load in the space identically in both models. If you wish to attempt to claim any energy savings you would need to do so as an exceptional calculation.