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

Two-stage comfort for medium-sized homes — smarter heating at an affordable 80% AFUE price point. The Goodman GR9T800803BN delivers 80,000 BTU of two-stage heating in a compact 17.5" upflow cabinet built for basements, closets, and utility rooms. Unlike single-stage furnaces that blast full heat every time they cycle, this unit runs at a lower output on mild days for quieter, more efficient operation — then steps up to full power when the temperature really drops. More comfort, less noise, same budget-friendly price point.

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-sized 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 that outperforms older PSC motor units, eliminating hot and cold spots throughout your home
• 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 1-3 ton R-32 cooling systems for a complete, balanced home comfort setup
• Compatible with electronic air cleaners and humidifiers — pairs seamlessly with indoor air quality accessories for whole-home comfort
• 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 with constant memory — stores the last fault codes so your technician can diagnose issues fast, 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: 1-3 Ton R-32 Systems

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