25HNA9 Performance Efficiency Up to 19 SEER/9 HSPF Warranty 10-year limited compressor 5-year limited parts Energy Star® Details As an Energy Star partner, Carrier Corporation has determined that the Infinity™ 19 heat pumps that achieve system combinations of 14.0 SEER, 8.2 HSPF and 11.5 EER or higher meet the Energy Star guidelines for energy efficiency. Sound Quiet Level As low as 72 dB Features Silencer System II Controls Controls Supported Infinity™ Control Diagnostics Infinity 18 point Technology Refrigerant Puron® Refrigerant Compressor Two-stage scroll Heating Capacity (Btuh) 24,000 - 60,000 Cooling Capacity (tons) 2 - 5 Aesthetics Protection WeatherArmor Ultra™ Construction Galvanized steel Paint Powder-coated, baked-on complete coverage Coil Guard Steel louver coil guard  25HNA6 Performance Efficiency Up to 16 SEER/9 HSPF Warranty 10-year limited compressor 5-year limited parts Energy Star® Details As an Energy Star partner, Carrier Corporation has determined that the Infinity™ 16 heat pumps that achieve system combinations of 14.0 SEER, 8.2 HSPF and 11.5 EER or higher meet the Energy Star guidelines for energy efficiency. Sound Quiet Level As low as 74 dB Features Silencer System II Controls Controls Supported Infinity Control Diagnostics Infinity 23 point Technology Refrigerant Puron Refrigerant Compressor Two-stage reciprocating Heating Capacity (Btuh) 24,000 - 60,000 Cooling Capacity (tons) 2 - 5 Aesthetics Protection WeatherArmor Ultra Construction Galvanized steel Paint Powder-coated, baked-on complete coverage Coil Guard Steel Louver Coil Guard  38YDB Performance Efficiency Up to 17 SEER/9.5 HSPF Warranty 10-year limited compressor 5-year limited parts Energy Star® Details As an Energy Star partner, Carrier Corporation has determined that the 38YDB heat pumps that achieve system combinations of 14.0 SEER, 8.2 HSPF and 11.5 EER or higher meet the Energy Star guidelines for energy efficiency. Sound Quiet Level As low as 74 dB Features Silencer System Controls Controls Supported Infinity Control Diagnostics Infinity 12 point Technology Refrigerant Puron Refrigerant Compressor Two-stage reciprocating Heating Capacity (Btuh) 24,000 - 58,000 Cooling Capacity (tons) 2 - 5 Aesthetics Protection WeatherArmor III Construction Steel Paint Powder-coated, baked-on Coil Guard WeatherArmor III