Goodman 40K BTU 96 Percent AFUE Gas Furnace Downflow Or Horizontal 17.5 Cabinet

The Goodman GD9S960403BN is a compact, high-efficiency downflow gas furnace built for closets, alcoves, and attic installations where the airflow needs to travel downward. With 96% AFUE efficiency and a 17.5" cabinet, it delivers exceptional heating in a space-saving design — perfect for smaller homes that need premium efficiency from a downflow configuration.

Key Features:

• 96% AFUE — converts 96 cents of every dollar of gas into usable heat
• 40,000 BTU input — ideal for smaller homes
• Downflow / horizontal installation — perfect for closets, alcoves, and attics
• Single-stage operation with 9-speed ECM blower motor for quiet, efficient airflow
• Heavy-duty aluminized-steel tubular heat exchanger and durable silicon nitride ignition system for years of trouble-free performance
• Stainless steel secondary heat exchanger for maximum heat extraction
• Self-diagnosing control board for easy troubleshooting
• Can be converted to propane with an optional LP conversion kit
• Low NOx emissions — meets nationwide installation requirements
• R-32 compatible with onboard RDS sensor
• AHRI Certified and ETL Listed

Specs:

• BTU Input: 40,000
• AFUE: 96%
• Cabinet Width: 17.5"
• Stages: Single
• Blower Motor: 9-Speed ECM
• Fuel Type: Natural Gas (LP convertible)
• Installation: Downflow / Horizontal
• Venting: PVC/Plastic
• Voltage: 115V

Compatibility: Compatible with 1-2 ton R-32 cooling systems. Pairs with Goodman R-32 condensers, heat pumps, and evaporator coils.

Warranty: 10-year limited parts warranty + lifetime heat exchanger warranty when registered within 60 days of installation.