This product has been discontinued.
Overview
The Middle Ages are rightly regarded as miserable, because people did not have amazing HVAC products like a Goodman GMS8 Series Single-Stage Gas Furnace! Instead of a dual-diameter tubular heat exchanger, they had to throw another log on the fire whenever they wanted to get warm. Everybody smelled like smoke, and it was always drafty. The GMS8 has a lifetime warranty for the heat exchanger. I bet you can't even get a warranty on wood.
Need a heating solution that packs a punch and will last for years to come? Put those cold winter days in your rear view mirror, with a GMS80 multi-speed furnace from Goodman. Built with high quality materials, the cabinet is uses heavy-gauge steel and is insulated to keep your energy losses at a minimum.
This Goodman furnace comes completely assembled and has been factory run tested to ensure you get a reliable product. With convenient features that make your experience a comfortable one, included is a multi-speed indoor blower motor that can be changed to fit your home needs. If paired with an air cooling system, the indoor blower will work effectively with a variety of compatible Goodman products. If you are installing a brand new air conditioner, this cabinet will fit flush with most coils.
The 80k BTU 80% AFUE Multi Speed Goodman Gas Furnace - Upflow/Horizontal - 21" Cabinet comes with a reliable limited parts warranty when registered within 60 days of your installation, should you ever experience a problem. The self-diagnosing control board also makes trouble shooting a breeze.
With an efficiency rating of 80,000 BTU and 80% efficiency, you can expect real all-winter heating performance which is suitable for large spaces in warmer or colder winter climates. If this furnace doesn’t fit your space, don’t sweat it, IWAE.com carries a large variety of furnaces to cover all of your needs. And since Goodman has been supplying the industry for over 3 decades with reliable home heating and cooling solutions at an affordable price, you can rest assured you’re getting great quality.

Manufacturer Highlights
The Goodman® brand GMS Series Gas Furnace offers energy efficiencies and operating sound levels that are among the best in the heating and cooling industry. Quality manufacturing as well as easy installation and maintenance make this unit one of the best values on the market.
Standard Features
- Dual-diameter tubular heat exchanger
- Single-stage combination redundant gas valve
- Norton hot surface mini-igniter
- Quiet multi-speed direct-drive circulator blower motor
- Furnace control board with self-diagnostics and lowvoltage terminal block
- Quiet single-speed, induced-draft blower
Cabinet Features
- Foil-faced insulation lines the heat exchanger compartment
- Factory sealed to achieve 2% or less leakage rate at 1.0" water gauge external duct static pressure
- Designed for multi-position installation: upflow, horizontal left or right
- Coil and furnace fit flush for most installations
Warranty Terms
For a full description of all warranties applicable to this product as well as individual manufacturer requirements, please review the manufacturer's consumer brochure and/or product warranty documents. Online warranty registration must be completed within 60 days of installation. Due to state laws, online registration is not required in California or Quebec. Call for warranty availability on scratch & dent and surplus items.
Installation of any product must comply with all applicable codes and regulations. The service of a certified and trained electrical technician may be required for the installation process.
Specifications
Model | GMS80805CN |
---|---|
UPC | 663051517844 |
AHRI Number | 201702259 |
Gas Furnace Efficiency | 80% |
Air Flow Direction | Horizontal, Upflow |
Configuration | Floor Mounted |
Avg Coverage Area | 1,250 - 1,500 Sq Ft |
Blower Motor | Multi Speed |
Cooling Compatibility (up to) | 5 Ton |
Electrical Phase | 1-Phase |
Exhaust Pipe | Metal |
Fuel Source | Natural Gas |
Gas Valve | Single Stage |
Max Overcurrent Protection | 15 amps |
Primary Heating Capacity | 75,001 - 80,000 BTU |
Product Height (in) | 33.375 |
Product Length (in) | 28 |
Product Width (in) | 21 |
System Application Type | Central Split Systems |
Vent Connection | 6 inches |
Voltage | 120 |
Warranty | 10 Year Parts, Lifetime Heat Exchanger |
Weight (lbs) | 163.0000 |
California Residents | see Prop 65 WARNING |