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| Lennox - Signature Series | | | Conservator 90™ Series Boiler - Energy Star®-qualified product
- 90% AFUE energy efficiency
- Energy-efficient, comfortable home heating
- Gas-fired (natural or LP)
- Cast-aluminum heat exchanger
- Sealed combustion system
- Excellent for radiant heating
- 15-Year Limited Warranty on heat exchanger
- 1-Year Limited Warranty on covered components
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| | Lennox - Elite Series | | | Conservator Series Boiler - 86.4% AFUE energy efficiency
- Gas boilers available in water or steam
- Oil boilers available in water
- Sealed combustion system
- 20-Year Non-Prorated Warranty on entire heat exchanger
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