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NC-2009 EAc1:Optimize Energy Performance

Cost of Renewable Energy

I am going to be modeling a building that plans on buying landfill gas to burn in boilers which will contribute to EAc2. I know I can double-dip on EAc1 and EAc2, so do I need to include the price of the renewable energy in the Energy Model? I assume I do, bit it's worth asking the question. If I do, then if the price of the landfill gas is more than the rate for natural gas from the utility, do I need to use the higher price on the proposed builing energy cost and still use the lower cost for the baseline?

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Thu, 09/08/2011 - 17:25

You should first confirm that landfill gas qualifies under LEED as an on-site renewable. CIRs and LEED Interpretations have generally not considered purchased bio-fuels and landfill gas as on-site renewable energy, eligible for EAc2, especially if there is not a long-term contract or some certainty that the use of the bio-fuel is permanent. If it is considered renewable, then it should be figured as free in the Design Case, prevailing local rates in the Baseline Case . If not, use the same price for both cases.

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