Search Search Search Heil Series Heil Series Ion™ Series (3)Performance Series (4) Sort by SEER2 Sort by SEER2 Sort by SEER2High to LowLow to High SEER2 Value SEER2 Value Reset N4A4SUp to 16 SEER2 S4A5SUp to 16 SEER2 N4A5SUp to 16.5 SEER2 N4A7TUp to 17 SEER2 H4A6SUp to 16.5 SEER2 H4A7TUp to 17.5 SEER2 HVA9Up to 19 SEER2