Carrier Heat Pumps 25VNA4Up to 24 SEERUp to 13 HSPF 25VNA8Up to 19 SEERUp to 11 HSPF 25HCB6Up to 17 SEERUp to 9.5 HSPF 25HPB6Up to 16 SEERUp to 9.5 HSPF 25HBC5Up to 15 SEERUp to 8.5 HSPF 25HCE4**CUp to 14 SEERUp to 8.2 HSPF 25HCE4Up to 14 SEERUp to 8.2 HSPF 25HHA4Up to 14 SEERUp to 8.2 HSPF