Trane Air Conditioners XV20iUp to 21.5 SEER2 XV18Up to 18 SEER2 XR14Up to 14.8 SEER2 XR16Up to 16.2 SEER2 XR13Up to 13.8 SEER2 XL17iUp to 17.2 SEER2 XL15iUp to 15.6 SEER2 XR15Up to 15.6 SEER2 XR15 Low ProfileUp to 15.6 SEER2