Goodman - 80,000 BTU 80% Gas Furnace - 21" Width - Upflow / Horizontal - Single Stage - 115V - R32 - GR9S800804CX

Goodman - 80,000 BTU 80% Gas Furnace - 21" Width - Upflow / Horizontal - Single Stage - 115V - R32 - GR9S800804CX

The GR9S800804CX Goodman low NOx gas furnace features high-quality construction and efficient operation at a great value. The GR9S800804CX single-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 GR9S800804CX.

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

• Solid 80% AFUE Heating Performance
  Delivers dependable warmth with an 80% AFUE efficiency, providing cost‑effective operation compared with older, low‑efficiency systems.

• Steady Single‑Stage Operation
  The single‑stage gas valve ensures consistent heat delivery and simple, reliable performance with fewer moving parts.

• 80,000 BTU Output for Larger Spaces
  With 80,000 BTU capacity, this unit reliably heats medium to larger homes, handling colder conditions without strain.

• Wide 21" Cabinet Design
  The 21‑inch width offers more internal airflow capacity and easier component access, ideal for installations with roomier equipment spaces.

• Upflow / Horizontal Flexibility
  Designed for upflow or horizontal duct configurations, making it adaptable to a variety of HVAC layouts.

• Multi‑Speed ECM Blower Motor
  The ECM blower provides better airflow efficiency, quieter operation, and more balanced air distribution throughout the home.

• R‑32 Refrigerant Compatibility
  Built to integrate with R‑32 HVAC systems, aligning with modern efficiency and refrigerant standards.

• Diagnostic‑Ready Design
  A self‑diagnostic control board with LED codes helps simplify servicing and troubleshooting.

Q&A

Q: What size home is this furnace designed for?
A: With 80,000 BTU output, this unit is ideal for medium to larger homes depending on insulation, layout, and climate.

Q: How efficient is this furnace?
A: It has an 80% AFUE efficiency rating, converting most fuel into usable heat for dependable, standard‑efficiency performance.

Q: What installation options are supported?
A: Supports Upflow and Horizontal configurations, allowing flexible placement in basements, attics, closets, or crawl spaces.

Q: What does “single stage” mean?
A: A single‑stage gas valve delivers full heat output whenever the thermostat calls for heat, providing straightforward, reliable heating.

Q: What electrical requirements does it have?
A: Operates on 115 V single‑phase power, which is standard for residential furnace installations.

Q: What refrigerant systems is it compatible with?
A: Designed to integrate with systems using R‑32 refrigerant.

Q: What are the benefits of this furnace model?
A: Offers simple operation, reliable warm airflow, and easy serviceability at a cost‑effective price point.

Q: What kind of blower motor does it use?
A: Features a multi‑speed blower motor for consistent airflow and comfort.

Q: Is this furnace suitable for tight spaces?
A: Yes — its 21″ cabinet width and flexible installation make it suitable for closets or utility areas with adequate airflow.

Maintenance Tips

• Replace air filters every 1–3 months to maintain airflow and efficiency.

• Keep supply and return vents unobstructed for optimal heating performance.

• Maintain 2–3 feet of clearance around the furnace to ensure safe operation.

• Inspect the condensate drain line periodically to prevent clogs and water damage.

• Check thermostat operation and settings to maintain consistent temperature control.

• Examine vent pipes and connections for leaks or blockages.

• Listen for unusual noises such as rattling, buzzing, or hissing indicating potential issues.

• Clean blower compartment and internal surfaces to prevent dust buildup.

• Test carbon monoxide detectors for safe gas furnace operation.