Built for steady residential heating, this furnace combines two-stage operation with a multi-speed ECM blower. Its 21-inch cabinet supports higher airflow while providing upflow or horizontal positioning.
The Goodman GR9T800804CN gas furnace has an 80,000 BTU maximum input and approximately 64,000 BTU of high-stage output. It can reduce its heating level during milder weather instead of running at full capacity every time.
The Goodman 80000 BTU gas furnace is intended for homes that require strong heating capacity and airflow support for cooling systems ranging from approximately 2.5 to 4 tons.
With its standard 80% efficiency rating, the Goodman 80 AFUE furnace works with conventional metal-flue venting.
Goodman GR9T800804CN Overview
The Goodman GR9T800804CN gas furnace uses two heating stages. The lower stage operates at 56,000 BTU input and 45,000 BTU output, while the higher stage reaches 80,000 BTU input and 64,000 BTU output.
A Goodman two-stage gas furnace can run at reduced capacity when the heating demand is moderate. It moves to the higher stage when indoor temperatures require more heat.
The Goodman nine-speed ECM furnace provides selectable cooling airflow settings along with five heating speed settings. It also supports a low continuous-fan setting for ongoing air circulation.
Its 21-inch C-width cabinet gives the Goodman 80000 BTU gas furnace enough room to support nominal airflow of 1,600 CFM and maximum airflow of approximately 1,695 CFM at 0.5 ESP.
Key Features of Goodman 80K BTU Gas Furnace
The Goodman GR9T800804CN gas furnace brings together staged heating, adjustable airflow and a durable cabinet without making daily operation complicated.
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Two-stage gas valve
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Nine cooling airflow speed settings
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Five heating airflow speed settings
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Multi-speed ECM blower motor
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80,000 BTU high-stage input
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56,000 BTU low-stage input
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Upflow and horizontal positioning
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Factory-integrated R-32 refrigerant detection controls
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Backward compatibility with R-410A systems
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Aluminized-steel tubular heat exchanger
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SureStart silicon nitride igniter
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Two-speed induced-draft blower
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Self-diagnostic control board
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Insulated heavy-gauge steel cabinet
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Natural gas operation with propane-conversion capability
The ECM blower is one of the more useful parts of this Goodman nine-speed ECM furnace. Its selectable settings allow airflow to be matched more closely with the connected indoor coil and outdoor equipment.
The lower firing stage allows the Goodman two-stage gas furnace to deliver gentler heat during moderate conditions. Full output remains available when the heating load increases.
Technical Specifications
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Specification
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Product Details
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Brand
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Goodman
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Model Number
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GR9T800804CN
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Equipment Type
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Gas furnace
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Fuel Type
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Natural gas
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Propane Convertible
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Yes, with the appropriate conversion kit
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AFUE Rating
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80%
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Maximum Heating Input
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80,000 BTU
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Maximum Heating Output
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64,000 BTU
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Low-Stage Heating Input
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56,000 BTU
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Low-Stage Heating Output
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45,000 BTU
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Heating Stages
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Two
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Blower Motor
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Multi-speed ECM
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Cooling Speed Settings
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Nine
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Heating Speed Settings
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Five
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Motor Rating
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3/4 HP
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Nominal Airflow
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1,600 CFM
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Maximum Airflow
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1,695 CFM at 0.5 ESP
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Supported Cooling Capacity
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2.5 to 4 tons
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Airflow Position
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Upflow or horizontal
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Heat Exchanger
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Aluminized-steel tubular design
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Ignition Type
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Silicon nitride hot-surface ignition
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Refrigerant Controls
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R-32 refrigerant detection system included
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Additional Compatibility
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R-410A compatible when properly configured
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Electrical Supply
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115V, single phase, 60 Hz
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Minimum Circuit Ampacity
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11.3 amps
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Maximum Breaker Size
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20 amps
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Vent Connection
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4 inches
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Cabinet Size
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C cabinet
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Height
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33.375 inches
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Width
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21 inches
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Depth
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28 inches
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Weight
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129 lbs
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GR9T800804CN Dimensions & Capacity
The Goodman GR9T800804CN gas furnace measures 33.375 inches high, 21 inches wide and 28 inches deep. The unit weighs approximately 129 lbs.
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Height: 33.375 inches
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Width: 21 inches
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Depth: 28 inches
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Weight: 129 lbs
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Cabinet designation: C cabinet
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Maximum input: 80,000 BTU
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Maximum output: 64,000 BTU
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Nominal airflow: 1,600 CFM
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Maximum airflow: 1,695 CFM at 0.5 ESP
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Cooling airflow range: 2.5 to 4 tons
The larger cabinet gives the Goodman nine-speed ECM furnace a 19.5-by-19.5-inch supply-air opening and a 15-by-23-inch side return-air opening.
Who Should Buy Goodman 80K BTU Gas Furnace?
The Goodman GR9T800804CN gas furnace may suit homeowners who need 80,000 BTU of input capacity, a wider 21-inch cabinet and flexible upflow or horizontal positioning.
The Goodman 80000 BTU gas furnace is a sensible match for properties where the calculated heating load and ductwork support its capacity. Home size alone should not be used to choose furnace output.
Consider the Goodman 80 AFUE furnace when the property is set up for conventional metal-flue venting and an 80% efficiency unit matches the intended HVAC design.
Buyers searching to buy Goodman GR9T800804CN online should confirm the required cabinet width, airflow demand, electrical supply and equipment compatibility before ordering.
Frequently Asked Questions
Q1. What is the heating capacity of this furnace?
The Goodman GR9T800804CN gas furnace has an 80,000 BTU maximum input and approximately 64,000 BTU of high-stage heating output.
Q2. How does its two-stage heating work?
The Goodman two-stage gas furnace can operate at a lower 56,000 BTU input level during moderate demand and move to its full 80,000 BTU input when more heat is required.
Q3. What does the nine-speed ECM blower do?
The Goodman nine-speed ECM furnace provides selectable cooling airflow settings, helping the blower match different indoor coil and outdoor equipment combinations.
Q4. Can this furnace be positioned horizontally?
Yes. The cabinet supports upflow, horizontal-left and horizontal-right configurations.
Q5. Is this furnace compatible with R-32 equipment?
Yes. Its control board includes an onboard refrigerant detection system configured for R-32 applications. It can also support R-410A equipment when properly configured.
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