Carrier Air Conditioners 24VNA6Up to 24 SEER2 24VNA9Up to 19 SEER2 24TPA7Up to 17 SEER2 24SPA6Up to 16.5 SEER2 24SCA5Up to 16.5 SEER2 24SCA4Up to 16 SEER2 24SCA5***CUp to 16 SEER2 34SCA5Up to 16 SEER2