The Platinum 20 variable speed heat pump system is one of the industry’s most efficient systems, with ratings up to 20.50 SEER2/8.70 HSPF2. Available in 2-, 3-, 4- and 5-ton models, this unit features a woven Spine Fin™ coil, Duration™ Variable Speed inverter-driven compressor and compatible with our American Standard Link® communicating technology.