A Versatile Gas-Fired Steam Boiler For Your Unique Home. When you’re shopping for a new gas-fired steam boiler (or for the right company to repair your existing steam boiler) in the Mankato areacommunity, Northern Comfort Inc is ready to help. We have the Lennox® GSB8-E, which comes with a long list of benefits. GSB8-E BoilerThis steam boiler is superior to its competition with an 82.7% AFUE rating* and noteworthy components like a cast-iron heat exchanger and titanium burners. For season after season of comfortable heat, look at the GSB8-E. Electronic ignition controls water temperature and turns on the burner only when it needs to Vent damper bolsters efficiency by closing automatically when the boiler shuts off Thick fiberglass insulation helps minimize off-cycle heat and energy loss Burns natural gas or convertible to LP gas Compatible 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 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 Northern Comfort Inc in Mankato area is is here to help you with a new high efficiency boiler! Call us at 507-307-4818 or create an appointment online. *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.