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Net-Zero Energy Buildings: Technical Report

Net-Zero Energy Buildings: A Classification System Based on Renewable Energy Supply Options Shanti Pless and Paul Torcellini Technical Report NREL/TP-550-44586 June 2010 Technical Report Net-Zero Energy Buildings: NREL/TP-550-44586 A Classification System Based June 2010 on Renewable Energy Supply Options Shanti Pless and Paul Torcellini Prepared under Task Nos. , National Renewable Energy Laboratory1617 Cole Boulevard, Golden, Colorado 80401-3393 303-275-3000 NREL is a national laboratory of the Department of Energy Office of Energy Efficiency and Renewable Energy Operated by the Alliance for Sustainable Energy , LLC Contract No. DE-AC36-08-GO28308 NOTICE This Report was prepared as an account of work sponsored by an agency of the United States government.

other central energy distribution system) to offset the energy used. For NZEBs, a utility connection is allowed for energy balances. A grid-connected NZEB uses traditional energy sources such as electricity and natural gas utilities when on-site generation from RE does not meet the loads.

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