Goodman 80,000 BTU 80% AFUE Single-Stage Gas Furnace Upflow/Horizontal 21" Cabinet R-32

Serious heating for medium to large homes — without the high-efficiency price tag. The Goodman GR9S800804CN delivers 80,000 BTU of single-stage heating in a wide 21" upflow cabinet built for basements, closets, and utility rooms where comfort is non-negotiable but space is at a premium. Pair it with any compatible 2-4 ton R-32 cooling system, and you've got a complete, balanced home comfort solution that's built to last.

Why You'll Love It:

• 80% AFUE efficiency — converts 80 cents of every energy dollar into heat, keeping operating costs predictable year after year
• 80,000 BTU input / 64,000 BTU output — confident, 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 better humidity control and quieter operation
• Wide 21" cabinet — compatible with 2-4 ton R-32 cooling systems, making it a natural fit for retrofit installs and tight mechanical rooms
• Upflow / horizontal installation — flexible placement options for basements, closets, or utility spaces
• Heavy-duty aluminized-steel tubular heat exchanger — engineered for long-lasting durability and efficient heat transfer
• 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, expanding your fuel options
• 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

Specs:

• Input: 80,000 BTU | Output: 64,000 BTU
• AFUE: 80%
• Cabinet Width: 21"
• Stages: Single
• Blower Motor: 9-Speed ECM
• Fuel Type: Natural Gas (LP Convertible)
• Installation: Upflow / Horizontal
• Venting: Metal
• Voltage: 115V
• Compatible Cooling: 2-4 Ton R-32 Systems

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