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The Goodman GD9S961205DN is a single-stage, multi-speed gas furnace rated at 120,000 BTU and 96% AFUE. It uses a 9-speed ECM blower and is built for downflow or horizontal installation. It suits larger homes and shoppers replacing an older furnace who want high efficiency without premium-brand extras. Against rivals, it lacks the variable-speed comfort and smart features of higher-end models, but owners often call it a solid value with a strong warranty.
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Lowest price we've seen: $2,411.87 on Nov 14 at Amazon. Tracked across 6 stores since Nov 14.
Owners and installers generally praise the furnace for reliable heating and good value. Some note the single-stage operation is less comfortable than modulating models.
This Goodman gas furnace is a single-stage unit with 120,000 BTU input and 96% AFUE efficiency. It converts about 96% of the fuel it uses into usable heat, which works out to roughly 115,200 BTUs of heating output. It is rated for homes of about 2,600 to 3,200 sq. ft. when properly sized and installed. Sizing should be confirmed with a professional load calculation.
It has a 9-speed ECM blower motor, which uses less electricity than older PSC motors and supports steady air circulation. The cabinet is heavy-gauge steel and insulated to help reduce operating noise. The furnace also has a durable hot surface igniter, a self-diagnostic control board and Goodman's heat exchanger design. The self-diagnostic controls simplify troubleshooting and service.
The furnace is designed for downflow and horizontal installation. It ships configured for natural gas and can be field-converted to liquid propane with an optional conversion kit. Because it is a 96% AFUE model, it uses PVC venting instead of the metal flue venting used with 80% AFUE furnaces. A trained HVAC technician should install and service it according to local codes and manufacturer requirements.
