Rheem Gas Furnace – Classic Series 80% AFUE Upflow / Horizontal (R801C)

The Rheem Classic Plus™ Series Gas Furnace was designed with industry-exclusive features for years of worry-free comfort. It’s also quiet, so you can stay focused on what matters most.

Rheem Gas Furnace – Classic Series 80% AFUE Upflow / Horizontal (R801S)Features

80% residential gas furnace CSA certified

3 way multi poise design UF / HZ

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.

Solid doors

Provide quiet operation

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 controls board

Features dip switches for easy system set up

QR codes

For quick access to product information from your smart phone or tablet

Specs / Docs / Certifications


  • Single-stage
  • Three way multi poise design
  • PSC Motor
  • Ruud-Exclusive PlusOne™ Ignition System
  • Industry-First PlusOne™ Diagnostics


Certifications / Qualifications:


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