The Lennox SL280V is a variable-speed gas furnace with a heating efficiency of 80% AFUE. The variable-speed motor operates mostly on low on mild days, resulting in energy savings and more consistent temperatures. The variable-speed technology is also designed to deliver greater humidity control. A sealed blower compartment increases efficiency and combines with sound-absorbing materials to provide quiet operation. A steel Duralok heat exchanger and silicone nitride SureLight igniter are designed for durability and long life. The SL280V can be paired with a matching Lennox air conditioner or heat pump to improve the system’s SEER. The SL280V is part of the Dave Lennox Signature Collection.