A Versatile Gas-Fired Steam Boiler For Your Unique Home. Arrings A/C & Heating in Humble has the perfect gas-fired steam boiler to keep your home snug and comfortable season after season. The Lennox® GSB8-E delivers exceptional benefits. Our friendly staff is ready to install yours, or help you repair your existing 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 for many, many years. Electronic ignition controls water temperature and ignites the burner only when needed Vent damper increases efficiency by closing automatically when the boiler turns off Thick fiberglass insulation helps minimize off-cycle heat and energy loss Burns natural gas or can be converted to LP gas Works 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 individual 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 Arrings A/C & Heating at 281-713-8304 for all your boiler-related needs in the Humble 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.