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The EPF of a building shall be calculated using Equation C-1 using its actual orientation, rotating the entire building 90, 180, and 270 degrees, then averaging the results.
(C-1)
where
ΣHVACsurface = sum of HVAC for each surface calculated using Equation C-2
ΣLightingzone = sum of lighting for each zone calculated using Equation C-3

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