This product has been discontinued.
Overview
Who wouldn't want the Goodman GMH8 80% AFUE 80k BTU 2 Stage Multi-Speed Gas Furnace? This unit is built for upflow/horizontal applications and is packed with features. It comes with an aluminized-steel dual-diameter tubular heat exchanger, an energy saving four-speed circulator motor that runs quietly, a durable 110-volt silicon nitride igniter, and an electronic control board with self-diagnostics and provisions for electronic air cleaner and humidifier.
In the market for a new gas furnace? Goodman has an affordable option for you! And it's made entirely in the USA. The GMH80 80k BTU 80% AFUE Multi Speed 2 Stage Goodman Gas Furnace - Upflow/Horizontal - 17.5" Cabinet is compact in size to fit a variety of spaces. In addition, it can flow up, down or sideways when attached to the right HVAC units ready to fit in your desired space. It's outer layers are painted to fit in with any home decor and style and is made to last. Want to enhance your system? Add a humidifier! Simply wire the furnace to a low-voltage terminal on the system control and you're good to go.
With this furnace from Goodman, there's no need to worry about noise. Past furnaces consisted of fans and motors that distracted homeowners with the amount of noise they made. This furnace is made to be nearly silent with a modern blower, motor and igniter that operates to the highest performance possible without compromising your level of comfort. Plus, this furnace masters circulation with a four-speed blower motor that can run in a variety of difficult conditions seamlessly.
In the unlikely event of complications, this furnace comes complete with a Goodman limited parts warranty. If you find the furnace having minor complications, call a licensed technician and he or she can easily evaluate the problem with an easy to read control board. Basically, regular maintenance has never been easier with a Goodman furnace!

Manufacturer Highlights
The Goodman® brand GMH Gas Furnaces offer 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
- Two-stage gas valve convertible technology allows installer to activate the two-stage valve with the flip of a dipswitch
- 110V Silicon Nitride igniter designed for long igniter life
- Furnace control board with self-diagnostics, colorcoded low-voltage terminals, and provisions for electronic air cleaner and 24-volt humidifiers
- Control board stores the last five diagnostic codes in memory; simple push-button activation outputs the fault history to a flashing red LED
- Low constant fan allows homeowner to activate the low heat speed to efficiently circulate air throughout the home
- Self-adjusting feature automatically adjusts to high- or low-stage operation based on outside temperature without an outdoor temperature sensor
- Dual-certified for sealed combustion direct vent (2-pipe) or non-direct vent (1-pipe) applications
- All models comply with California NOx emissions standards
Cabinet Features
- Fully insulated, heavy-gauge steel cabinet with durable baked-enamel finish
- Foil-faced insulation lines the heat exchanger
- Designed for multi-position installation
- Easy-to-install top venting is standard; alternate flue/vent located on the right
- Airtight solid bottom for side-return applications and easy-cut tabs for effortless removal in bottom air inlet applications
- Convenient left or right connection for gas and electric service
- 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 | GMH80804BN |
---|---|
UPC | 663051487741 |
AHRI Number | 201702289 |
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) | 4 Ton |
Electrical Phase | 1-Phase |
Exhaust Pipe | Metal |
Fuel Source | Natural Gas |
Gas Valve | Two 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) | 17.5 |
System Application Type | Central Split Systems |
Vent Connection | 6 inches |
Voltage | 120 |
Warranty | 10 Year Parts, Lifetime Heat Exchanger, 10 Year Unit Replacement |
Weight (lbs) | 107.0000 |
California Residents | see Prop 65 WARNING |