The Rheem Classic Series® Super Quiet 80 line of upflow/horizontal gas furnaces are designed for utility rooms, closets, alcoves, or attics. Because of the Super Quiet 80’s low-profile 34 inch [864 mm] height, the upflow model can also be used to satisfy most applications that traditionally call for a horizontal furnace. These furnaces can be installed in an upflow position or laid on either side in a horizontal position. Field conversion not required. See spec sheets for more features. The Heat Exchanger features a 20-Year Limited Warranty. All other parts have a 5-Year Limited Parts Warranty. 10-year conditional parts warranty available for registered equipment.