Goodman 80,000 BTU 80% AFUE Two-Stage Gas Furnace Upflow/Horizontal 17.5" Cabinet R-32

Smarter heating for medium to large homes — two-stage comfort at an 80% AFUE price. The Goodman GR9T800804BN delivers 80,000 BTU of two-stage heating in a compact 17.5" upflow cabinet built for basements, closets, and utility rooms where space is tight but comfort isn't negotiable. Run at lower output on mild days for quieter, more efficient operation — then ramp up to full power when the cold really hits. All the smart heating benefits of two-stage technology without the cost of a high-efficiency unit.

Why You'll Love It:

• 80% AFUE efficiency — converts 80 cents of every energy dollar into heat, keeping operating costs predictable without overpaying for efficiency you don't need
• 80,000 BTU input / 64,000 BTU output — confident, consistent heating for medium to large homes without oversizing or waste
• Two-stage gas valve — runs at lower output on mild days for gentler, quieter cycling and more even room temperatures, then ramps to full power when temperatures really drop
• 9-speed ECM blower motor — precise, quiet airflow matched to a 4-ton cooling system, eliminating hot and cold spots and outperforming older PSC motor units
• Upflow / horizontal installation — flexible placement in basements, closets, or utility rooms to suit your home's layout
• Compact 17.5" cabinet — fits tight spaces while supporting up to 4-ton R-32 cooling systems for a complete, balanced home comfort setup
• Heavy-duty aluminized-steel tubular heat exchanger — engineered for long-lasting durability and efficient heat transfer with wrinkle-bend technology for added dependability
• Silicon nitride igniter — more durable than older hot surface igniters, reducing maintenance calls and replacement costs over the life of the unit
• Self-diagnosing control board — acts like a "check engine light" for your furnace, pinpointing issues fast and cutting service time and costs
• LP convertible — easily field-converted to propane with optional kit, giving you fuel flexibility for your home
• Metal flue venting required — straightforward installation using standard metal duct for safe, code-conforming exhaust
• R-32 compatible — future-ready refrigerant support for pairing with modern R-32 cooling systems
• AHRI Certified and ETL Listed — independently verified for safety and performance
• Made in the USA — designed, engineered, and assembled domestically

⚠️ Metal venting required — this is an 80% AFUE furnace and requires metal flue venting, not PVC.

Specs:

• Input: 80,000 BTU | Output: 64,000 BTU
• AFUE: 80%
• Cabinet Width: 17.5"
• Stages: Two
• Blower Motor: 9-Speed ECM
• Fuel Type: Natural Gas (LP Convertible)
• Installation: Upflow / Horizontal
• Venting: Metal
• Voltage: 115V
• Compatible Cooling: Up to 4 Ton R-32 Systems

Warranty: 10-year limited parts + lifetime heat exchanger warranty with online registration within 60 days of installation.