gas, coal, coke, propane, petroleum and its derivatives, residual fuel oil, alcohol-based fuels, wood, biomass, and any other material consumed as fuel. (5) Exported energy The term exported energy means on-site renewable energy supplied through the site boundary and used outside the site boundary. (6) High rise commercial building The term high rise commercial building means a commercial building of four or more above grade stories. (7) High rise residential building The term high rise residential building means a multifamily building with four or more above grade stories. (8) kW h The term kWh means Kilowatt Hour. (9) Low rise residential building The term low rise residential building means a single-family home or multifamily building with no more than three above grade stories. (10) On-site renewable energy The term on-site renewable energy means any renewable energy collected and generated within the site boundary that is used for building energy, and the excess renewable energy exported outside the site boundary, provided that any renewable energy certificates associated with the on-site renewable energy must be retained or retired by the building owner or lessee to be claimed as on-site renewable energy. (11) Renewable energy The term renewable energy means energy generated by biomass, hydro, geothermal, solar, wind, ocean thermal, wave action, or tidal action resources. (12) Renewable energy certificate The term renewable energy certificate means a certificate or credit that represents and conveys the environmental, social, or other nonpower qualities of one megawatt hour of renewable energy, and can be sold separately from the underlying physical electricity associated with the renewable energy resource. (13) Site boundary The term site boundary means the limits of the building site across which delivered energy and exported energy are measured. (14) Source energy The term source energy means building energy plus the energy losses in thermal combustion in electricity generation resources