A Versatile Gas-Fired Steam Boiler For Your Unique Home. Custom Sheetmetal & Roofing, Inc. in Topeka has an excellent gas-fired steam boiler to keep your home warm and comfortable for years to come. The Lennox® GSB8-E delivers remarkable benefits. Our team is here to install yours, or help you fix your home’s 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 years to come. Electronic ignition controls water temperature and turns on the burner only when needed Vent damper increases efficiency by closing automatically when the boiler shuts off Thick fiberglass insulation reduces off-cycle heat and energy loss Burns natural gas or can be converted to LP gas Compatible with traditional radiator and underfloor heating systems Electronic low water cut-off Hefty steam chest and multiple supply connections help eliminate noise Available in seven different sizes to fit your home’s unique 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 Call Custom Sheetmetal & Roofing, Inc. at 785-357-6200 for all your boiler-related needs in the Topeka 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.