Goodman - 100,000 BTU 80% Low NOx Gas Furnace - 21" Width - Upflow / Horizontal - Two Stage - 115V - R32 - GR9S801005CX
The GR9S801005CX Goodman low NOx gas furnace features high-quality construction and efficient operation at a great value. The GR9S801005CX single-stage, 9-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 GR9S801005CX.
Features
- This furnace is ideal to heat a medium to large house (depending on climate)
- 100,000 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% 100,000 BTU Single Stage Gas Furnace - 21" Width - Upflow / Horizontal |
| SKU |
GR9S801005CX |
| Weight (in lbs) |
132.000000 |
| AHRI Certificate Number |
215358062 |
| Airflow Direction |
Upflow/Horizontal |
| Exhaust Flue Requirement |
Metal |
| R-32 Compliant |
Yes |
| Brand/Manufacturer |
Goodman |
| Product Features |
Low NOx, New Refrigerant Compliant |
| Furnace Efficiency / AFUE |
80% |
| Heating BTU |
100,000 |
| Blower Motor |
9 Speed - ECM |
| Maximum CFM |
2000 |
| Horsepower |
3/4 HP |
| Configuration |
Upflow/Horizontal |
| Electrical |
115 V. 1 Phase 60 Hz |
| Max Breaker Size |
15 Amps |
| Min. Breaker Size |
11.3 Amps |
| Low NOx |
Low NOx |
| Burner Stages |
Single |
| Fuel Type |
Propane, Natural Gas |
| Height |
33 3/8" |
| Width |
21" |
| Depth |
28" |
Manual
What our Experts Think
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Powerful 100 k BTU Output: Designed to deliver 100,000 BTU of heating input, this furnace easily handles comfort needs in medium to larger homes with consistent, reliable warmth.
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80 % AFUE Efficiency: Converts 80 % of fuel into usable heat, offering cost‑effective performance while keeping installation and maintenance simpler than high‑efficiency models.
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Low NOx Emissions: Built to meet Low NOx emissions standards, helping reduce nitrogen oxide output for better environmental performance in regulated areas.
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Single‑Stage Comfort: Single‑stage gas valve provides predictable, steady heat without complexity—ideal for homeowners who prioritize simplicity and durability.
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Flexible Upflow/Horizontal Fit: Supports upflow and horizontal installations, making it easier to fit in attics, basements, closets, and tight mechanical spaces.
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Multi‑Speed ECM Blower: The 9‑speed ECM blower motor improves airflow control and quiet operation, enhancing overall comfort distribution.
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R‑32 Refrigerant Compatible: Designed to pair with R‑32 compliant HVAC systems, ensuring modern compatibility for paired cooling equipment.
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Durable, Service‑Ready Build: Heavy‑gauge cabinet, self‑diagnostic control board, hot‑surface ignitor, and color‑coded terminals help simplify installation and maintenance.
Q&A
Q: What heating capacity and efficiency does the Goodman GR9S801005CX 100 000 BTU 80% Low NOx Gas Furnace deliver?
A: This unit provides 100 000 BTU input heat with 80% AFUE efficiency and Low NOx emissions compliance, delivering reliable, cost‑effective warmth while reducing nitrogen oxide emissions.
Q: What type of gas valve and stages does it use?
A: It features a single‑stage gas valve for consistent heating output.
Q: What blower and motor does the furnace include?
A: The furnace uses a multi‑speed ECM blower motor (up to ~2000 CFM) to provide quieter, efficient airflow and better comfort control.
Q: What installation orientations are supported?
A: Designed for upflow and horizontal left/right installation, giving flexibility in basements, attics, closets, or utility rooms.
Q: What electrical and venting requirements does it have?
A: The unit operates on 115 V, single‑phase, 60 Hz electrical service and requires metal flue venting for safe combustion exhaust.
Q: What durability and performance features are included?
A: Includes a heavy‑gauge steel cabinet, durable hot surface igniter, self‑diagnostic control board, and color‑coded low‑voltage terminals for reliable operation and easier installation.
Q: What are the physical dimensions?
A: Measures approximately 33 3/8″ H × 21″ W × 28″ D, fitting standard residential HVAC spaces.
Q: What fuel types are supported?
A: Factory configured for natural gas and can often be converted to LP (propane) with a proper conversion kit.
Maintenance Tips
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Replace or clean air filters every 1–3 months to maintain airflow and prevent dust buildup on the heat exchanger and blower.
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Inspect the heat exchanger annually for cracks or corrosion to ensure safe and efficient operation.
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Clean burners, pilot assembly, and ignition system to maintain reliable two-stage combustion.
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Check the blower motor and fan assembly for dust, debris, and lubrication needs.
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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 gas valves, two-stage operation, and thermostat for accurate temperature control.
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Verify 115V electrical connections and inspect wiring for wear or corrosion.
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Keep surrounding area clear to maintain airflow and reduce fire hazards.
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Schedule annual professional HVAC service for full inspection, cleaning, and safety testing.
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Register your furnace to activate warranty coverage and maintain service records
Damage 
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