The 1.5-5 ton XL16i air conditioner offers single-stage cooling and up to 17.00 SEER. This unit’s design features a swept fan blade, an all-aluminum Spine Fin™ coil, and Climatuff® compressor, making it a durable and efficient choice for your home. A Weatherguard Top™, a unique design exclusive to Trane, protects the unit from the elements.