Goodman - 120,000 BTU 80% Gas Furnace - 24.5" Width - Upflow / Horizontal - Single Stage - 115V - R32 - GR9S801205DN
The GR9S801205DN Goodman gas furnace features high-quality construction and efficient operation at a great value. The GR9S801205DN single-stage, multi-speed furnace utilizes Goodman's superior heat exchanger design to provide efficient, reliable heating to your home. If you're looking to cut your energy bills and improve your comfort without breaking the bank, your search stops with the Goodman GR9S801205DN.
Features
- This furnace is ideal to heat a larger house (depending on climate)
- 120,000 BTU 80% efficient natural gas furnace
- Requires metal flue venting
- Can be used in the upflow or horizontal orientation
- Can be converted to an LP furnace with a conversion kit (sold separately)
- Innovative design for electrical efficiency, safety, and lower sound output
Specifications
| Goodman 80% 120,000 BTU Single Stage Gas Furnace - 24.5" Width - Upflow / Horizontal |
| SKU |
GR9S801205DN |
| Weight (in lbs) |
132.000000 |
| AHRI Certificate Number |
215358063 |
| Airflow Direction |
Upflow/Horizontal |
| Exhaust Flue Requirement |
Metal |
| R-32 Compliant |
Yes |
| Brand/Manufacturer |
Goodman |
| Product Features |
New Refrigerant Compliant |
| Furnace Efficiency / AFUE |
80% |
| Heating BTU |
120,000 |
| Blower Motor |
9 Speed - ECM |
| Maximum CFM |
2000 |
| Configuration |
Upflow/Horizontal |
| Electrical |
115 V. 1 Phase 60 Hz |
| Max Breaker Size |
25 Amps |
| Min. Breaker Size |
14.3 Amps |
| Burner Stages |
Single |
| Fuel Type |
Propane, Natural Gas |
| Height |
33 3/8" |
| Width |
24 1/2" |
| Depth |
28" |
Manual
What our Experts Think
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High‑Output Heating Capacity: With 120,000 BTU and 80% AFUE, this furnace delivers strong, dependable warmth for larger homes and high‑demand spaces without overcomplicating performance.
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Single‑Stage Simplicity: Single‑stage operation focuses on reliable heat delivery and straightforward functionality—ideal for homeowners and contractors who want proven durability.
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Flexible Installation: Designed for upflow or horizontal applications, making it easy to place in closets, attics, basements, or crawlspaces.
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Standard 115V Power: Operates on common 115‑volt electrical service, simplifying wiring and integration into existing systems.
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Robust Build Quality: Built with dependable components that stand up to everyday use and deliver consistent performance season after season.
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Service‑Friendly Design: Accessible panels and familiar layout make servicing and routine maintenance more efficient for technicians.
Q&A
Q: What is the heating capacity and efficiency of the furnace?
A: The Goodman GR9S801205DN 120,000 BTU 80% Gas Furnace delivers 120,000 BTU input with 80% AFUE, providing 96,000 BTU of usable heat — a solid choice for larger homes requiring dependable warmth.
Q: What installation orientations are supported?
A: This gas furnace supports upflow or horizontal (left/right) installation configurations, offering flexibility for attic, basement, or closet setups.
Q: What type of blower and motor does it use?
A: It’s equipped with a multi‑speed ECM blower motor (9‑speed) for better airflow control and quieter operation.
Q: How efficient and suitable is it for modern HVAC systems?
A: It’s compliant with R32 refrigerant systems, making it compatible with newer split system air conditioners.
Q: What power requirements and electrical features are there?
A: Operates on 115 V, single‑phase, 60 Hz electrical service with typical breaker sizing requirements (~14.3–25 A).
Q: What fuel types does it support?
A: Designed to run on natural gas, and some configurations can be converted to LP (propane) with the correct kit.
Q: What are the physical dimensions?
A: The furnace measures approximately 33 3/8″ high × 24 1/2″ wide × 28″ deep, fitting standard HVAC equipment spaces.
Q: What durability and standard features does it include?
A: Features include a heavy‑duty aluminized‑steel heat exchanger, hot‑surface igniter, self‑diagnostic controls, and color‑coded low‑voltage terminals for reliable performance.
Maintenance Tips
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Replace or clean air filters every 1–3 months to maintain airflow and prevent dust buildup on heat exchanger and blower components.
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Inspect the heat exchanger annually for cracks or corrosion to ensure safe and efficient operation.
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Clean the burners and pilot assembly to maintain proper ignition and efficient combustion.
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Check the blower motor and fan assembly for dust, debris, and proper lubrication.
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Inspect venting and flue pipe for obstructions or leaks to ensure safe exhaust of combustion gases.
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Test the gas valve and thermostat to verify correct operation and temperature regulation.
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Ensure proper electrical connections (115V) and check for loose wiring or signs of wear.
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Schedule annual professional HVAC service for complete inspection, cleaning, and safety testing.
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Keep surrounding area clear to maintain airflow and prevent fire hazards.
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Register your furnace to activate warranty coverage and maintain service records.
Damage 
Loss 
Theft 
