GSHA Services, LTD installed a high-efficiency Lennox dual-fuel heating and cooling system for a homeowner in Northbrook, IL. The system pairs a Lennox Elite EL297V variable-speed gas furnace (model EL297UH110XV60C) with a Lennox Elite EL18KSLV 5-ton variable-capacity heat pump and a matching CK40 cased coil, controlled by a Lennox thermostat that automatically switches between electric heat pump and gas heat for the lowest operating cost. We also installed a Healthy Climate media air cleaner and a Lennox whole-home humidifier, and the homeowner qualified for the ComEd air-source heat pump rebate. Looking for heat pump installation, furnace replacement, or dual-fuel HVAC in Northbrook, Glenview, Deerfield, or the North Shore? GSHA Services is a Lennox dealer serving Chicago's northern suburbs.