A Versatile Gas-Fired Steam Boiler For Your Unique Home. Falls Mechanical Services LLC in Great Falls has the ideal gas-fired steam boiler to keep your home warm and comfortable year after year. The Lennox® GSB8-E provides remarkable benefits. Our friendly staff is ready to install yours, or help you fix your current steam boiler. GSB8-E BoilerSetting it apart from other standard-efficiency boilers, this boiler earned an 82.7% AFUE* and features a cast-iron heat exchanger and titanium burners. The GSB8-E will deliver cozy, comfortable warmth for years to come. Electronic ignition controls water temperature and lights the burner only when needed Vent damper bolsters efficiency by closing automatically when the boiler shuts off Thick fiberglass insulation reduces off-cycle heat and energy loss Burns natural gas or can convert 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 Falls Mechanical Services LLC at 406-761-SAVE for all your boiler-related needs in the Great Falls 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.