YH2E Up to 14.3 SEER2 Up to 8 HSPF2 HMH7 Up to 18 SEER Up to 10.5 HSPF YZT Up to 19 SEER Up to 18 SEER2 Up to 10 HSPF Up to 8.1 HSPF2 YZV Up to 21 SEER Up to 19 SEER2 Up to 10.75 HSPF Up to 9 HSPF2 YH6 Up to 16 SEER2 Up to 8 HSPF2 YHE Up to 14 SEER Up to 8.2 HSPF YHM Up to 16 SEER HH8 Up to 18 SEER2 YH2F Up to 15.2 SEER2 Up to 8.1 HSPF2 YH4 Up to 14.3 SEER2 YH5 Up to 15.2 SEER2