A Versatile Gas-Fired Steam Boiler For Your Unique Home. O'Brien Heating & Air Conditioning in the Main Line has an excellent gas-fired steam boiler to keep your home warm and comfortable for years to come. The Lennox® GSB8-E provides remarkable benefits. Our team is ready to install yours, or help you repair your existing steam boiler. GSB8-E BoilerThis boiler is superior to other standard-efficiency boilers with it’s 82.7% AFUE* rating, cast-iron heat exchanger and titanium burners. The GSB8-E will supply your home with cozy, comfortable warmth for many, many years. Electronic ignition oversees water temperature and turns on the burner only when needed Vent damper boosts efficiency by closing automatically when the boiler shuts off Thick fiberglass insulation minimizes off-cycle heat and energy loss Burns natural gas or can convert to LP gas Will work with traditional radiator and underfloor heating systems Electronic low water cut-off Hefty steam chest and multiple supply connections work to eliminate noise Available in seven different sizes to fit your home’s particular needs 12-year limited warranty on heat exchanger, 1-year limited warranty on remaining covered parts Efficiency Rating (AFUE): up to 82.7 Product Brochure Contact Us to Learn More Contact O'Brien Heating & Air Conditioning at 610-626-2540 for all your boiler-related needs in the the Main Line area. Or, set up an appointment with our online scheduler. We look forward to serving you! *Annual Fuel Utilization Efficiency (AFUE) measures how efficient the appliance is in converting its fuel’s energy into heat over the course of a year.