A Versatile Gas-Fired Steam Boiler For Your Unique Home. When you’re shopping for a new gas-fired steam boiler (or for an expert to fix your current steam boiler) in the Colfax area, Ackerman Heating & Air Conditioning is ready to help. We have 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 many years of comfortable heat, look at the GSB8-E. Electronic ignition controls water temperature and lights the burner only when needed Vent damper increases efficiency by closing automatically when the boiler turns off Thick fiberglass insulation reduces off-cycle heat and energy loss Burns natural gas or can be converted to LP gas Compatible with traditional radiator and underfloor heating systems Electronic low water cut-off Big steam chest and multiple supply connections work to eliminate 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 Ackerman Heating & Air Conditioning in Colfax is is here to help you with a new high efficiency boiler! Call us at 509-397-3622 or schedule 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.