2023 ZERO CARBON STEP CODE AND BC ENERGY STEP CODE REQUIREMENTS FOR NEW BUILDINGS

While GHG emission intensity limits may vary slightly between building occupancies, the overall mechanical system implications at each ZCSC level are the same: • EL-1 only requires measurement and reporting of a building's modelled GHG emissions. • EL-2 can be achieved through electrification of either the domestic hot water system or the space heating system within the building. • EL-3 requires electrification of both space heating and domestic hot water systems. • EL-4 is the most stringent level, reflecting very low GHG emission intensities that can be achieved in an all-electric building connected to BC's electrical grid.

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