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

The most popular furnace size for medium-sized homes — serious heating power in a compact, affordable package. The Goodman GR9S800803BN delivers 80,000 BTU of single-stage heating at 80% AFUE in a compact 17.5" upflow cabinet — one of the best-selling furnace configurations on the market for a reason. It hits the sweet spot between heating output, cabinet size, and price that medium-sized homes need most. No oversizing, no unnecessary complexity, no premium price tag — just dependable Goodman warmth season after season.

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 ratings designed for larger or colder applications
• 80,000 BTU input / 64,000 BTU output — the most popular heating capacity for medium-sized homes, delivering powerful, consistent warmth without oversizing or wasted capacity
• Single-stage operation with 9-speed ECM blower motor — steady, even airflow throughout your home with quieter operation and better humidity control than 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 installation spaces while supporting 1-3 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: Single
• 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.