Everyones Home is Unique and WM J Kraus & Son Has the Versatile Gas-Fired Steam Boiler For You. WM J Kraus & Son in Keokuk has an excellent gas-fired steam boiler to keep your home snug and comfortable season after season. The Lennox® GSB8-E comes with extraordinary benefits. Our team is happy to install yours, or help you maintain your home’s steam boiler. GSB8-E BoilerA cast-iron heat exchanger, titanium burners, and an 82.7% AFUE* rating set this steam boiler apart from other standard-efficiency gas-fired steam boilers. The GSB8-E will deliver cozy, comfortable warmth heating season after heating season. Electronic ignition controls water temperature and ignites the burner only when needed Vent damper increases efficiency by closing automatically when the boiler shuts off Thick fiberglass insulation minimizes off-cycle heat and energy loss Burns natural gas or can be converted to LP gas Will work with traditional radiator and underfloor heating systems Electronic low water cut-off Big steam chest and multiple supply connections reduce 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 Reach out to WM J Kraus & Son at 319-229-2318 for all your boiler-related needs in the Southeast Iowa 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.