The Lennox GWB8-E is a gas-fired boiler with an efficiency of up to 83.9% AFUE. It is available in nine sizes and is shipped for use with natural gas but easily converted to LP gas. It features a cast iron heat exchanger and stainless steel burners for long-lasting durability and resistance to corrosion. An electronic ignition control improves efficiency by turning on the burners only when needed, and the unit’s vent damper maintains efficiency by automatically closing when the boiler turns off. The GWB8-E has a thick layer of fiberglass insulation which increases the unit’s efficiency by reducing heat loss.
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