Single-Zone Four Way Ceiling Cassette – CKS Up to 22.4 SEER2 Up to 12.2 HSPF2 Floor Mounted – FKS Up to 22.8 SEER2 Up to 13 HSPF2 Single-Zone Heat Pump for Floor Mount Up to 28.2 SEER2 Up to 13.2 HSPF2 Standard Wall Mount Cooling Only Up to 24.6 SEER2 Standard Wall Mount ST Up to 24.6 SEER2 Up to 12.8 HSPF2 Deluxe Wall Mount PH Up to 33.1 SEER2 Up to 13.5 HSPF2 18 SEER Wall Mount – ML Up to 18 SEER2 Up to 10 HSPF2 Wall Mount – EL Up to 16 SEER2 Up to 8.5 HSPF2 115V Wall Mount MT Up to 23 SEER2 Up to 9 HSPF2 Single-Zone Cooling Only ST Up to 24.6 SEER2 Single-Zone Heat Pump ML Up to 18 SEER2 Up to 10 HSPF2 Single-Zone Heat Pump PH Up to 33.1 SEER2 Up to 13.5 HSPF2 Single-Zone Heat Pump ST Up to 24.6 SEER2 Up to 12.8 HSPF2 Single-Zone Heat Pump EL Up to 16 SEER2 Up to 8.6 HSPF2 115V Single-Zone MT Up to 23 SEER2 Up to 9 HSPF2 Multi-Position Air Handler AMT Up to 19 SEER2 Up to 13.7 HSPF2 Horizontal Ducted – DKS Up to 22 SEER2 Up to 13.1 HSPF2 Horizontal Ducted – TPEAD Up to 20.5 SEER2 Up to 13 HSPF2 Designer Wall Mount MSZ-EF Multi-Zone Heat Pump MX Up to 20 SEER2 Up to 11.5 HSPF2 Horizontal Ducted – 4MXD23 Up to 23 SEER2 Up to 10.5 HSPF2 Multi-Zone Four Way Ceiling Cassette – CKS Up to 22.4 SEER2 Up to 12.2 HSPF2 EZ Fit Recessed Ceiling Cassette Up to 22.3 SEER2 Up to 13.3 HSPF2