9 heat-pump models in EPRELSONIFERModels9Top typeAir-to-air (5)Top refrigerantR290 (3)Heat pump typesAir-to-air5 (56%)HP water heater4 (44%)RefrigerantsR2903 (33%)R322 (22%)Top models by SCOPFDI 95APkW 2.3R R32ADR 97AR R290FDI 243APkW 4.8R R32ADR 12050AR R290ADRW 12050AR R290TRM 104CTRM 84CTRM 17BSee all 9 models →