Everyones Home is Unique and C-N-O Comfort Zone Has the Versatile Gas-Fired Steam Boiler For You. If you need a new gas-fired steam boiler (or for the right company to fix your home’s steam boiler) in the St. Louis neighborhood, C-N-O Comfort Zone is here for you. We have the Lennox® GSB8-E, which comes with a diverse menu of benefits. GSB8-E BoilerThis steam boiler is superior to its competition with an 82.7% AFUE rating* and notable components like a cast-iron heat exchanger and titanium burners. For season after season of comfortable heat, look at the GSB8-E. Electronic ignition oversees water temperature and ignites the burner only when needed 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 can convert to LP gas Compatible 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 particular 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 C-N-O Comfort Zone in Saint Peters is ready to serve you with a new high efficiency boiler! Call us at 636-255-8997 or set up 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.