Lennox EL280 Commercial Gas Furnaces in Knoxville Consistency is crucial for the Lennox® EL280 gas furnace, and the unit’s 2-stage heating makes it possible, while also improving comfort control. Energy efficiency in this unit is rated at 80% AFUE, with the help of its sealed blower compartment that generates quieter operating sounds. The EL280 includes a silicone nitride-constructed SureLight® ignitor that grants a long product life and reliable performance long into the future. That means less stress for you and increased comfort for the employees at your company. 66,000-132,000 Btuh Upflow/horizontal and dedicated downflow models 33” design profile Direct-drive slide-out blower Toolless entry for simple maintenance R & M Climate Control Service Experts Heating & Air Conditioning in Knoxville has expertly trained service technicians who will provide expert installation and routine tune-ups. And, should any service issues arise, we can be there in minutes. Make your free appointment today or call 865-229-6176 for more information.