Goodman - 80,000 BTU 80% Gas Furnace - 21" Width - Upflow / Horizontal - Two Stage - 115V - R32 - GR9T800804CN

Goodman - 80,000 BTU 80% Gas Furnace - 21" Width - Upflow / Horizontal - Two Stage - 115V - R32 - GR9T800804CN

The GR9T800804CN Goodman gas furnace features high-quality construction and efficient operation at a great value. The GR9T800804CN two-stage, 9-speed furnace utilizes Goodman's superior heat exchanger design to provide efficient, reliable heating to your home. If you're looking to cut your energy bills and improve your comfort without breaking the bank, your search stops with the Goodman GR9T800804CN.

Features

• This furnace is ideal to heat a medium-sized house (depending on climate)
• 80,000 BTU 80% efficient natural gas furnace
• Requires metal flue venting
• Can be used in the upflow or horizontal orientation
• Can be converted to an LP furnace with a conversion kit (sold separately)
• Innovative design for electrical efficiency, safety, and lower sound output
  

Specifications

Manual

• Installation Manual
• Specifications Sheet
  

What our Experts Think

• Balanced Heating Capacity: Offers 80,000 BTU input with 80% AFUE, delivering dependable warmth for medium to larger homes while keeping fuel costs reasonable.

• Two‑Stage Heating for Comfort: Two‑stage gas valve adjusts output to match demand—running quieter with fewer temperature swings compared to single‑stage models.

• Advanced Airflow Control: The multi‑speed ECM blower motor improves airflow consistency, enhances comfort, and reduces energy use during heating cycles.

• R‑32 Refrigerant Compliance: Built to support R‑32 compliant HVAC systems, ensuring compatibility with modern split systems and refrigerant standards.

• Flexible Installation: Configured for upflow or horizontal orientation, simplifying placement in attics, basements, or tight mechanical spaces.

• Durable Construction: Insulated, heavy‑gauge steel cabinet with self‑diagnostic control helps reduce noise, enhance durability, and support long‑term reliability.

• Service‑Ready Features: SureStart igniter and self‑diagnostic board streamline maintenance and improve reliability over time.

Q&A

Q: What is the heating capacity and efficiency of the Goodman GR9T800804CN furnace?
A: The Goodman GR9T800804CN delivers 80,000 BTU input heat with an 80% AFUE efficiency, providing dependable warmth for medium‑sized homes.

Q: What type of heating stages does it have?
A: It features a two‑stage gas valve, offering quieter operation, more even heat distribution, and improved comfort compared to single‑stage models.

Q: What blower motor and airflow does the furnace use?
A: Equipped with a multi‑speed ECM circulator motor that supports up to ~1600 CFM for efficient, quiet airflow.

Q: What installation orientations are supported?
A: Designed for upflow or horizontal (left/right) installation, allowing flexibility in attics, basements, or closets.

Q: What power requirements does it have?
A: Operates on 115 V single‑phase electrical service with typical circuit requirements around 15 A.

Q: What fuel types are supported?
A: Compatible with natural gas and convertible to liquid propane (LP) with the appropriate kit.

Q: What are the physical dimensions?
A: The furnace measures approximately 21″ width × 28″ depth × 33‑3/8″ height with a weight around 129 lbs.

Q: How durable and serviceable is this unit?
A: Features include a heavy‑duty aluminized steel tubular heat exchanger, SureStart® silicon nitride igniter, and self‑diagnostic control board for reliable performance.

Q: What venting type does it require?
A: As an 80% AFUE furnace, it requires metal flue venting.

Maintenance Tips

• Replace or clean air filters every 1–3 months to maintain airflow and prevent dust buildup on the heat exchanger and blower.

• Inspect the heat exchanger annually for cracks or corrosion to ensure safe operation and efficiency.

• Clean burners, pilot assembly, and ignition system to maintain proper two-stage combustion.

• Check the blower motor and fan assembly for dust, debris, and lubrication needs.

• Inspect venting and flue pipe for obstructions or leaks to ensure safe exhaust of combustion gases.

• Test gas valves, two-stage operation, and thermostat for accurate temperature control.

• Verify 115V electrical connections and check wiring for wear or corrosion.

• Keep surrounding area clear to maintain airflow and reduce fire hazards.

• Schedule annual professional HVAC service for inspection, cleaning, and safety checks.

• Register your furnace to activate warranty coverage and maintain service records.