GA thanks for clarifying that. I still see higher COP's listed for high stage heating in the mfg data sheets. AHRI will match a 3.5 ton indoor coil with a 2 ton condenser. Very common for example on the Yorks' I've looked at trying to get 8.5HSPF and 15 SEER while staying in the more economical LX line rather than jumping to the 2 stage Affinity series. Same with Carrier. Goodman however, matches better and seems to have better ratings on heating... which is why I asked about it earlier. On top of try to give some advice here and there I'm also learning and doing some of my own research for myself.