Specification Sheet
Rheem Classic
®
Series
Downflow Gas Furnace
FORM NO. G11-547 REV. 1
R801S (Downflow) Series
80% A.F.U.E.†
Input Rates 50-150 kBTU
Air
Gas Furnaces
R801S (DF) Series
✝A.F.U.E. (Annual Fuel Utilization Efficiency) calculated in accordance with
Department of Energy test procedures.
• 80% residential Gas Furnace CSA certified
• PlusOne
™
Diagnostics — 7 Segment LED all units
• PlusOne
™
Ignition System – DSI for reliability and longevity
• Heat exchanger is removable for improved serviceability.
Aluminized steel construction provides maximum corrosion
resistance and thermal fatigue reliability.
• Low profile 34" cabinet ideal for space constrained
installations
• Integrated Control board features dip switches for easy
system set up
• QR code for quick access to product information from your
smart phone or tablet