Ruud R801T Ultra Low NOx Upflow/Horizontal Gas Furnace.


  • FIRST CERTIFIED, lowest emission furnace in the industry
  • Industry – First, Ultra Low NOx technology 
  • Environmentally friendly and responsible
  • Single Stage, Same 34″ Cabinet Height, Simple Technology, Same Installation
  • For Upflow/Horizontal configurations only
  • 80% residential Gas Furnaces CSA certified
  • PlusOne™ Diagnostics: 7-Segment LED for faster and more accurate diagnostics
  • PlusOne™ Ignition System: DSI for unmatched durability & years of worry-free operation
  • Removable heat exchanger
  • Constant Torque electrically commutated motor
  • 3-Phase induced draft blower motor
  • Pre-Mix Burner
  • Aluminized steel construction provides maximum corrosion resistance and thermal fatigue reliability
  • Solid doors provide quiet operation
  • Solid bottom
  • Insulated blower compartment
  • Low Profile 34″ cabinet ideal for space constrained installations
  • Blower shelf design – serviceable in all furnace orientations
  • Hemmed edges on cabinets and doors
  • 1/4 turn door knobs for tool less access
  • Integrated control board features dip switches for easy system set up
  • QR code for quick access to product information from your smartphone or tablet


  • 360 Serviceability™ with a removable heat exchanger