14 heat-pump models in EPRELGeothermikModels14Avg SCOP4.58Across all listed modelsTop typeAir-to-water (13)Heat pump typesAir-to-water13 (93%)Ground-source1 (7%)Top models by SCOPUltra 9 tub 400APPPSCOP 5.58kW 11GME 5 19 230APPPSCOP 5.40kW 19GME 5 13 400APPPSCOP 5.40kW 13Ultra 14 400APPPSCOP 4.65kW 14GMG 5 10 230APPPSCOP 4.47kW 10GMG 5 08 230APPPSCOP 4.45kW 8GMG 5 08 400APPPSCOP 4.45kW 8Aqua+ 5 400 YHAPPSCOP 4.40kW 14See all 14 models →