Goodman 120,000 BTU 96% AFUE Single-Stage Gas Furnace Downflow/Horizontal 24.5" Cabinet R-32

Maximum downflow heating power — built for the largest spaces. The Goodman GD9S961205DN is the flagship of the GD9S96 downflow lineup, delivering a massive 120,000 BTU of high-efficiency heating at 96% AFUE in the widest 24.5" cabinet. Whether you're heating a large family home or a light commercial space from a closet or attic installation, this furnace pushes air downward through your duct system with precision, efficiency, and Goodman's proven long-term reliability.

Why You'll Love It:

• 96% AFUE efficiency — converts 96 cents of every energy dollar into heat, one of the highest efficiency ratings available for a single-stage gas furnace
• 120,000 BTU input / 115,200 BTU output — maximum heating power built for large homes and light commercial spaces, not smaller homes
• Single-stage operation with 9-speed ECM blower — steady, even airflow 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
• Wide 24.5" cabinet — the largest cabinet in the GD9S96 lineup, compatible with 2-5 ton R-32 cooling systems
• Heavy-duty aluminized-steel tubular primary heat exchanger — engineered for long-lasting durability and efficient heat transfer
• Stainless steel secondary heat exchanger — extracts additional heat from exhaust gases to achieve the 96% AFUE efficiency rating
• Silicon nitride igniter — more durable than older hot surface igniters, reducing maintenance calls and replacement costs
• 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
• PVC/plastic venting required — high-efficiency condensing operation requires plastic vent pipe, not metal
• Low NOx emissions — meets air quality requirements for nationwide installation
• 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 GR9S961205DN.

⚠️ PVC/Plastic venting required — this is a 96% AFUE condensing furnace and cannot use metal flue venting.

Specs:

• Input: 120,000 BTU | Output: 115,200 BTU
• AFUE: 96%
• Cabinet Width: 24.5"
• Stages: Single
• Blower Motor: 9-Speed ECM
• Fuel Type: Natural Gas (LP Convertible)
• Installation: Downflow / Horizontal
• Venting: PVC / Plastic
• Voltage: 115V
• Compatible Cooling: 2-5 Ton R-32 Systems

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