64 heat-pump models in EPRELA.O. Smith Water Products Company B.V.Models64Avg SCOP4.34Across all listed modelsTop typeHP water heater (48)Heat pump typesHP water heater48 (75%)Air-to-water16 (25%)Top models by SCOPWWHB 20APPPSCOP 5.67kW 22WWHB 40APPPSCOP 5.60kW 43AWHP 90APPSCOP 4.42kW 64AWHP 65APPSCOP 4.40kW 51AWHP 60APPSCOP 4.38kW 43AWHP 30APPSCOP 4.35kW 22AWHP 40APPSCOP 4.22kW 29AWHP 60 SLNAPPSCOP 4.20kW 41See all 64 models →