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

Powerful downflow heating for medium to large homes — built tough, priced right. The Goodman GD9S800804BN delivers 80,000 BTU of dependable single-stage heating in a 17.5" downflow cabinet engineered for closet, alcove, and attic installations where air flows downward through your duct system. No gimmicks, no unnecessary complexity — just reliable Goodman warmth season after season at a price that makes sense.

Why You'll Love It:

• 80% AFUE efficiency — converts 80 cents of every energy dollar into heat, keeping monthly bills predictable without overpaying for efficiency you don't need
• 80,000 BTU input / 64,000 BTU output — powerful, consistent heating for medium to large homes without oversizing or waste
• Single-stage operation with 9-speed ECM blower — steady, even airflow throughout your home with quieter operation and better humidity control than older PSC motor units
• Downflow / horizontal installation — purpose-built for closets, alcoves, and attic installs where air needs to travel downward through the duct system
• 17.5" cabinet width — compatible with 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 maximum heat transfer efficiency
• 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
• Compatible with electronic air cleaners and humidifiers — pairs seamlessly with indoor air quality accessories for whole-home comfort
• LP convertible — easily field-converted to propane with optional kit, giving you fuel flexibility
• 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

⚠️ Downflow / Horizontal installation only. For upflow applications, see the GR9S800804BN.

Specs:

• Input: 80,000 BTU | Output: 64,000 BTU
• AFUE: 80%
• Cabinet Width: 17.5"
• Stages: Single
• Blower Motor: 9-Speed ECM
• Fuel Type: Natural Gas (LP Convertible)
• Installation: Downflow / 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.