Everyones Home is Unique and McNatt Inc Has the Versatile Gas-Fired Steam Boiler For You. If you need a new gas-fired steam boiler (or for an expert to fix your current steam boiler) in the Robstownneighborhood, McNatt Inc is here to help. We offer the Lennox® GSB8-E, which boasts a diverse menu of benefits. GSB8-E BoilerThis steam boiler rises above its competition with an 82.7% AFUE rating* and notable components like a cast-iron heat exchanger and titanium burners. For years of comfortable heat, look at the GSB8-E. Electronic ignition controls water temperature and lights 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 Works 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 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 McNatt Inc in Robstown is ready to serve you with a new high efficiency boiler! Call us at 361-247-0605 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.