80,000 BTU Furnace, 80% Efficiency, Single-Stage Burner, 1200 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application
80,000 BTU Furnace, 80% Efficiency, Single-Stage Burner, 1200 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application
Model: Goodman GMES800803BN


Model: Goodman GMES800803BN
Delivers consistent reliable warmth year after year
Sturdy design for long term durability
Built for simple installation and easy maintenance
Peace of mind with 10 year warranty (with registration)
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High Altitude Natural Gas Kit for GCES8 / GMES8 / GM9S8 / GC9S8 / GMS8 / GMH8 / GDS8 / GME8 / GHS8 / GDH8 Furnaces (5,501 - 10,000 Feet)
$34.99
LP Gas Low Pressure Switch for GMVM97, GCVM97, GMSS96, GCSS96, GMH95, GKS95 and DCH9 Series Furnaces
$89.99
Propane (LP) Conversion Kit for Single Stage Goodman Furnaces
$54.99
- Pro Installation (Learn More)

This is a Horizontal / Upflow unit.

To use LP fuel, this unit requires an LP Conversion Kit. See Accessories
The Goodman GMES8 multi-position gas furnaces feature a patented aluminized steel tubular heat exchanger and high-efficiency hot surface ignition system. These furnaces are run-tested for heating or combination heating/cooling applications. With a heavy-gauge, reinforced, wrap-around insulated steel cabinet and durable baked enamel finish, these gas heaters can be installed in a utility room, closet, alcove, basement or attic. (Not intended for use in mobile homes).
Important Safety Notice
Furnace Features
- Operates as a natural gas furnace out of the box, and can be easily converted to a propane furnace with optional propane conversion kit (see Accessories tab).
- Corrosion-resistant, aluminized-steel tubular furnace heat exchanger
- Furnace is designed for multi-position installation - Goodman GMS8: upflow, horizontal right or left; Goodman GDS8: dedicated downflow
- Energy-saving, reliable hot surface ignition system with Goodman furnace patented adaptive learning algorithm to maximize igniter life
- Aluminized steel inshot gas furnace burners
- Energy-saving PSC, multi-speed, direct drive blower motor
- Quiet, corrosion-resistant induced draft furnace blower assembly
- Integrated Goodman furnace control with diagnostics
- Low voltage terminal blocks
- Multiple flame roll-out switches, blower door safety switch, outlet air-limit switch and pressure switch for proof of combustion air
- 40VA transformer for heating and air conditioning control service
- Combination redundant gas valve and regulator
- A rotating combustion air blower (Goodman GMS8) that provides the option of venting the furnace through the top, right-hand side or left-hand side
- Completely assembled, factory run-tested furnace for heating or combination heating/cooling application
- Furnace has heavy-gauge, reinforced, fully insulated steel cabinet with durable baked-enamel finish
- Attractive architectural gray paint finish
- Heater's foil-face insulation lines the heat exchanger compartment
- Coil and furnace fit flush for easy installation
- Convenient left or right connection for gas and electric service
- Bottom or side air inlet (Goodman GMS8)
- Removable, solid-bottom block off
- This furnace does not comply with California NOx Standards (the Goodman furnace models that end in "X" do comply). This furnace is not for sale to the state of California due to emissions laws. Please see our high efficiency Goodman furnaces (models GMS9, GCS9, GMV9, GCV9, GMH) which are compliant with California laws.
Enjoy free shipping on any accessories purchased with the Goodman GMES800803BN.
- Standard AC Wiring Diagrams update(PDF, 2.79 MB)
- Goodman GMES8 Brochure(PDF, 815 KB)
- Goodman Furnace User Manual 2019(PDF, 1.18 MB)
- Goodman Furnace Warranty 2019(PDF, 392 KB)
- Goodman GMES8 GCES8 Installation Instructions 2022(PDF, 2.54 MB)
- Goodman GMES8 GCES8 Specifications Sheet 2021(PDF, 1.52 MB)
- Wire Gauge Sizes(PDF, 40.9 KB)
