Just curious how to input one EIR from 2 Baseline 90.1 minimum COP based on weather/ temperature. I know that the EIR is at ARI conditions and have a decent way to interpolate it, but am not sure how to average the COP's to get to that point. Example from Ashrae 90.1 Test: ARI 340/360: Table 6.8.1B Air cooled HP (Heating Mode) - between 65000 and 135000 btu/h - at 47 FDB = 3.2 COP & @17FDB = 2.2 COP I need to translate an annual COP/ HSPF into an adjusted EIR for equest. I am relatively new to energy modeling. thanks, nic