Built for larger spaces up to 1250 sq. ft., this 18000 Btu ductless mini split pairs 18400 Btu heating output with a 19 SEER2 inverter compressor that adjusts power to actual demand across four operating modes. Sleep and Mute modes hold noise to 33 dB, and the 135degree(s)F self-cleaning function with washable filter minimizes long-term maintenance.