Unitary split system heat pump includes "Daikin Inside" inverter technology for more consistent, high efficiency cooling and heating, in 2 to 5 ton capacities, with up to 21 SEER. The variable speed inverter scroll compressor delivers only the capacity required to maintain desired room conditions and reducing energy consumption, with fewer moving parts for dependability and quiet operation. https://daikincomfort.com/products/heating-cooling/whole-house/heat-pumps/dz20vc