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I would like to input "Rated Cooling COP" of "AirConditioner:VariableRefrigerantFlow". The engineer provides both EER and IEER for the unit. Which one should I use to calculate COP? As I know, IEER shows the performance of part load. However, the EER of this unit only shows the unit performance when VRF is operating 99%-100% of its full-size. I think most of the time, the unit will operate less than 98% of its full-size. Does it mean that I should use IEER to calculate the COP but not EER? Thanks.

I would like to input "Rated Cooling COP" of "AirConditioner:VariableRefrigerantFlow". The engineer provides both EER and IEER for the unit. Which one should I use to calculate COP? As I know, IEER shows the performance of part load. However, the EER of this unit only shows the unit performance when VRF is operating 99%-100% of its full-size. I think most of the time, the unit will operate less than 98% of its full-size. Does it mean that I should use IEER to calculate the COP but not EER? Thanks.