Day & Night Air Conditioners CVA9Up to 19 SEER2 C4A7TUp to 17.5 SEER2 N4A7TUp to 17 SEER2 N4A5SUp to 16.5 SEER2 C4A6SUp to 16.5 SEER2 N4A4SUp to 16 SEER2 S4A5SUp to 16 SEER2