A Versatile Gas-Fired Steam Boiler For Your Unique Home. Campbell's Tempracure in Crystal Lake has the ideal gas-fired steam boiler to keep your home cozy and comfortable for years to come. The Lennox® GSB8-E delivers extraordinary benefits. Our team is here to install yours, or help you maintain 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 provide cozy, comfortable warmth for many, many years. Electronic ignition controls water temperature and lights the burner only when needed Vent damper bolsters efficiency by closing automatically when the boiler is off Thick fiberglass insulation helps minimize 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 Large 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 Campbell's Tempracure at 815-788-6283 for all your boiler-related needs in the Crystal Lake area. Or, schedule 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.