Goodman - 100,000 BTU 80% Low NOx Gas Furnace - 21" Width - Downflow / Horizontal - Two Stage - 115V - R32 - GD9T801005CX
The GD9T801005CX Goodman gas furnace features high-quality construction and efficient operation at a great value. The GD9T801005CX two-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 GD9T801005CX.
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 downflow 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 Two Stage Gas Furnace - 21" Width - Downflow / Horizontal |
| SKU |
GD9T801005CX |
| Weight (in lbs) |
131.000000 |
| AHRI Certificate Number |
215358016 |
| Airflow Direction |
Downflow/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 |
| Configuration |
Downflow/Horizontal |
| Electrical |
115 V. 1 Phase 60 Hz |
| Max Breaker Size |
25 Amps |
| Min. Breaker Size |
14.3 Amps |
| Low NOx |
Low NOx |
| Burner Stages |
Two |
| Fuel Type |
Propane, Natural Gas |
| Height |
33 3/8" |
| Width |
21" |
| Depth |
28" |
Manual
What our Experts Think
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100,000 BTU Heating Capacity – Provides strong heating output for medium to large homes, delivering reliable warmth when it’s needed most.
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80% AFUE Efficiency – A value‑focused standard‑efficiency rating that balances upfront cost with consistent performance.
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Two‑Stage Gas Valve – Offers quieter operation, smoother temperature control, and better energy use than single‑stage units under varying conditions.
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Multi‑Speed ECM Blower Motor – Efficient airflow management reduces noise and improves comfort across seasons.
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California Low NOx Compliance – Reduces harmful nitrogen oxide emissions for more environmentally responsible operation where required.
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Downflow/Horizontal Flexibility – Supports multiple installation orientations, making it easier to fit in attics, basements, or tight utility spaces.
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Durable, Insulated Cabinet – Heavy‑gauge steel design with low air leakage enhances quiet operation and long‑term durability.
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115 V Residential Power – Compatible with standard electrical service for simplified wiring and installation.
Q&A
Q: What size home is this furnace suited for?
A: With 100,000 BTU input and 80% AFUE (≈80,000 BTU output), it’s well‑suited for medium to large homes when properly sized based on climate and insulation.
Q: What does “80% AFUE” mean?
A: 80% AFUE means 80% of the fuel’s energy is converted to heat for your home, with the rest lost through flue venting — a common efficiency for reliable residential performance.
Q: What are the benefits of the two‑stage gas valve?
A: The two‑stage gas valve operates at a lower setting most of the time for quieter heating, better comfort, and reduced energy use, switching to full power when needed.
Q: Does this model support low emissions?
A: Yes — it’s California Low NOx compliant, meaning reduced nitrogen oxide emissions for better environmental performance (outside some restricted districts).
Q: What type of blower motor does it use?
A: A multi‑speed ECM blower motor delivers efficient airflow, quieter operation, and improved comfort compared with standard motors.
Q: Where can this furnace be installed?
A: Supports downflow and horizontal installation, offering flexibility for attics, crawl spaces, utility rooms, or tight areas.
Q: Is it compatible with propane?
A: Yes — it’s factory‑set for natural gas but convertible to propane (LP) with an optional conversion kit by a professional.
Maintenance Tips
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Replace Air Filters Every 1–3 Months: Maintains airflow, efficiency, and protects the two-stage blower motor.
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Keep Vents & Registers Clear: Ensure supply and return vents are unobstructed for balanced airflow and consistent heating.
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Annual Professional Inspection: Have a technician check burners, heat exchanger, gas pressure, ignition system, and two-stage operation for safe and efficient performance.
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Inspect Venting System: Check flue pipes and exhaust vents for blockages or corrosion to ensure proper Low NOx combustion.
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Maintain Surrounding Area: Keep the furnace area free of dust, debris, and flammable materials.
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Verify Thermostat Operation: Ensure the thermostat supports efficient two-stage heating and variable airflow.
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Monitor for Unusual Signs: Strange noises, odors, or inconsistent heating should prompt immediate professional service.
Damage 
Loss 
Theft 
