Search Search Search Lennox Series Lennox Series Dave Lennox Signature® Collection (4)Elite® Series (8)Merit® Series (2) Sort by SEER2 Sort by SEER2 Sort by SEER2High to LowLow to High SEER2 Value SEER2 Value Reset Sort by HSPF2 Sort by HSPF2 Sort by HSPF2High to LowLow to High HSPF2 Value HSPF2 Value Reset ENERGY STAR® ENERGY STAR® Yes (14) SL25XPVUp to 23 SEER2Up to 10.3 HSPF2 XP25Up to 22 SEER2Up to 8.6 HSPF2 XP21Up to 17.8 SEER2Up to 8.2 HSPF2 XP20Up to 20 SEER2Up to 8.4 HSPF2 EL18XPVUp to 21.6 SEER2Up to 8.7 HSPF2 EL22XPVUp to 22 SEER2Up to 9.5 HSPF2 EL17XP1Up to 17 SEER2Up to 8.5 HSPF2 ML17XP1Up to 14.3 SEER2Up to 7.5 HSPF2 SL22KLVUp to 21.1 SEER2Up to 10.5 HSPF2 EL21KLVUp to 21 SEER2 EL19KPVUp to 19.5 SEER2Up to 9 HSPF2 EL18KSLVUp to 19.5 SEER2Up to 10 HSPF2 EL16KP1Up to 17 SEER2Up to 8.5 HSPF2 ML14KP1Up to 14.3 SEER2Up to 7.5 HSPF2