Everyone’s Home is Unique and Controlled Comfort HVAC Inc 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 existing steam boiler) in the Carpentersville area, Controlled Comfort HVAC Inc is here for you. We sell 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 years of comfortable heat, look to the GSB8-E. Electronic ignition oversees water temperature and turns on the burner only when needed Vent damper increases efficiency by closing automatically when the boiler turns 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 reduce 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 Controlled Comfort HVAC Inc in Carpentersville is is here to help you with a new high efficiency boiler! Call us at 224-699-9229 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.