Under LEED EBOM 2009 I am considering attempting metering under credit EAc3.2 for a 200,000 sq. ft. school with 4 mechanical rooms serving 5 zones with gas boilers and several gas fired RTUs for space heating. There is also a kitchen and a meter is installed to account for kitchen gas use. We receive meter inputs from the supplier meters and from the meters in each mechanical room with data being stored by the building automation system. Site electricity is used to run the pumping and fan systems but not as a heat source. Electricity is used primarily for cooling, lighting and plug loads. I did a rough gas (%) of total energy use calculation = gas therms / (gas therms + electrical therms) x 100 = 51%. Since gas heating energy use exceeds the 40% energy use requirement and we have metered gas to all zones – might we be able to achieve 1 EAc3.2 credit?
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Hannah Bronfman
Senior Associate99 thumbs up
November 7, 2013 - 3:42 pm
Hi James
It sounds like this could work, as long as you could isolate the gas used for space heating from the other gas uses (kitchen). Therefore, as long as the space heating is over 40% of the total energy use AND is one of the top two largest energy use categories (based on your energy end use breakdown of all energy sources), then it sounds like this would work.
Best,
Hannah