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Due to 2015 IECC referencing ASHRAE 90.1-2013 and 2015 IECC not providing a specific calculation we use the ASHRAE methodology in 2015 IECC code compliance energy models. The COP values from table 6.8.1-1 through 6.8.1-4 should not be used in an energy modeling program that models fan power and cooling power separately!