The Efficiency of Lennox Gas and Oil-Fired Boilers

Circulate warm water or steam through your radiant heating system with a Lennox residential boiler. Three varieties are gas-fired water boilers, oil-fired water boilers and gas-fired steam boilers. Here are examples of each:

The Lennox GWM-IE is a high-efficiency, gas-modulating condensing water boiler designed to maximize fuel savings with a 40% greater efficiency than a conventional boiler. Heating output is matched to household demand.


The  Lennox COWB3 is an oil-fired water boiler delivering quiet, standard-efficiency performance. It is built with quality components such as a Beckett® oil burner and a durable cast iron heat exchanger.

Lennox COWB3

The  Lennox GSB8-E gas-fired steam boiler supplies cozy, comfortable warmth to your home with standard efficiency, and is built with high-quality materials such as titanium burners and a cast iron heat exchanger.


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