We’ve thought of everything to bring your customers efficient and dependable indoor comfort solutions—efficiency 80% A.F.U.E.1 Input rates from 50 to 125 kBTU. We increased energy savings with the W801C, which has a constant Torque ECM Motor that maintains efficiency across a range of operating speeds, using less electrical energy than a standard PSC motor. Our W801C Gas Furnace comes standard with the direct spark ignition system (DSI), which is one of the most dependable ignition systems available today. This technology is the same proven design used on gas ovens and stoves. Quiet Operation is what you get with the W801C Gas Furnace. The tight door seal helps eliminate whistling. We’ve also added rubber grommets on the motor mounts and a twist-lock wire harness in the blower shelf. Easy installation and maintenance features for a quick installation and repairs. The W801C Gas Furnace is designed with the industry-first 7-segment LED display, a feature that makes service calls quick and easy.