284ANVUp to 23 SEER2Up to 10.5 HSPF2 288BNVUp to 15 SEER2Up to 9 HSPF2 291VANUp to 21.2 SEER2Up to 12.5 HSPF2 293VANUp to 23 SEER2Up to 9.5 HSPF2 290VANUp to 20 SEER2Up to 9.5 HSPF2 248TANUp to 18 SEER2Up to 8.5 HSPF2 248TAN***CUp to 18 SEER2Up to 8.5 HSPF2 246SANUp to 16 SEER2Up to 7.8 HSPF2 235SANUp to 16 SEER2Up to 8.1 HSPF2 235SAN***CUp to 16 SEER2Up to 8.1 HSPF2