The Lennox GSB8-E is a gas-fired steam boiler with an efficiency rating of up to 83.9% AFUE. The GSB8-E features a cast iron heat exchanger designed for long lasting durability and titanium burners for increased resistance to corrosion. The unit’s thick fiberglass insulation reduces energy loss while helping to lower sound levels. An electronic ignition control which turns the burner on only as needed and a vent damper that closes automatically when the boiler turns off both help to increase efficiency.
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