Lennox Heat Pumps Search Search Search Lennox Series Lennox Series Dave Lennox Signature® Collection (3)Elite® Series (4)Merit® Series (3) Sort by SEER Sort by SEER Sort by SEERHigh to LowLow to High SEER Value SEER Value Reset Sort by HSPF Sort by HSPF Sort by HSPFHigh to LowLow to High HSPF Value HSPF Value Reset ENERGY STAR® ENERGY STAR® Yes (10) SL25XPVUp to 24 SEERUp to 23 SEER2Up to 11.8 HSPFUp to 10.3 HSPF2 XP25Up to 23.5 SEERUp to 10.2 HSPF XP21Up to 19.2 SEERUp to 17.8 SEER2Up to 9.7 HSPFUp to 8.2 HSPF2 XP20Up to 20 SEERUp to 20 SEER2Up to 10 HSPFUp to 8.4 HSPF2 EL18XPVUp to 20 SEERUp to 10 HSPF EL16XP1Up to 17 SEERUp to 10 HSPF EL15XP1Up to 16 SEERUp to 9 HSPF ML16XP1Up to 17 SEERUp to 10 HSPF ML14XP1Up to 16 SEERUp to 8.2 HSPF 16HPXUp to 16.5 SEERUp to 9.5 HSPF