Goodman 100,000 BTU 80% AFUE Single-Stage Gas Furnace Downflow/Horizontal 21" Cabinet R-32

Maximum heating power for large homes — built to last. The Goodman GD9S801005CN is the flagship of the GD9S80 downflow lineup, delivering 100,000 BTU of single-stage heating in a wide 21" cabinet. Whether you're heating a large family home or a light commercial space from a closet or attic installation, this furnace gets the job done reliably and affordably.

Why You'll Love It:

• Affordable 80% AFUE efficiency — converts 80 cents of every energy dollar into heat
• 100,000 BTU input — maximum output for the largest homes and spaces
• Wide 21" cabinet — supports up to 5-ton cooling systems for whole-home comfort
• 9-speed ECM blower motor — smarter airflow, quieter operation, lower electric bills
• Downflow/horizontal design — engineered for closet, alcove, and attic installs
• Self-diagnosing control board — alerts your technician to issues fast, reducing service time and cost
• LP convertible — easily field-converted to propane with optional kit
• Metal flue venting — straightforward installation using standard metal duct
• R-32 compatible — future-ready, eco-friendly refrigerant support
• Made in the USA — designed, engineered, and assembled domestically

Specs:

• BTU Input: 100,000 | Output: 80,000
• AFUE: 80%
• Cabinet Width: 21"
• Stages: Single
• Blower Motor: 9-Speed ECM
• Fuel Type: Natural Gas (LP Convertible)
• Installation: Downflow / Horizontal
• Venting: Metal
• Voltage: 115V
• Compatible Cooling: 2-5 Ton R-32 Systems

⚠️ Downflow/Horizontal installation only. For upflow applications, see the GR9S801005CN.

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