Goodman - 100,000 BTU 80% Low NOx Gas Furnace - 21" Width - Upflow / Horizontal - Two Stage - 115V - R32 - GR9T801005CX

Goodman - 100,000 BTU 80% Low NOx Gas Furnace - 21" Width - Upflow / Horizontal - Two Stage - 115V - R32 - GR9T801005CX

The GR9T801005CX Goodman low NOx gas furnace features high-quality construction and efficient operation at a great value. The GR9T801005CX 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 GR9T801005CX.

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

Manual

• Installation Manual
• Specifications Sheet
  

What our Experts Think

• Powerful & Clean‑Burning Comfort
  The Goodman GR9T801005CX 100,000 BTU 80 % Low NOx Gas Furnace delivers reliable, cost‑effective heat with reduced nitrogen‑oxide emissions—helping meet regional environmental standards without sacrificing performance.

• Two‑Stage Heating for Smoother Comfort
  The two‑stage gas valve provides gentle low‑fire heat during mild weather and full output in cold conditions, resulting in more consistent temperatures and reduced heating cycles compared with single‑stage models.

• Quiet, Efficient Airflow with Multi‑Speed ECM
  A 9‑speed ECM blower motor improves airflow control and energy efficiency while reducing noise, offering better comfort distribution throughout the home.

• Installer‑Friendly Multi‑Position Design
  Designed for upflow and horizontal installation, this furnace fits attics, closets, basements, and retrofit spaces with fewer layout constraints—helping reduce installation time and complexity.

• Durable Construction & Smart Controls
  Heavy‑gauge steel cabinet, SureStart silicon nitride igniter, and self‑diagnostic control board enhance durability and make service diagnostics faster and easier.

Q&A

Q1: What heating capacity and efficiency does this furnace deliver?
A: The Goodman GR9T801005CX delivers 100,000 BTU input (~80,000 BTU output) with an 80% AFUE rating, meaning most fuel is converted into heat for efficient home heating.

Q2: What type of heating operation does it use?
A: It features a two‑stage gas valve for quieter, more economical heating performance than a single‑stage design.

Q3: What blower and motor features are included?
A: It includes a multi‑speed ECM blower motor (9‑speed) for smoother airflow, enhanced comfort, and reduced noise.

Q4: What installation orientations does it support?
A: This model supports upflow and horizontal installation, giving flexibility for attics, basements, closets, or crawl spaces.

Q5: What emissions standard does it meet?
A: It’s a Low NOx model, designed to reduce nitrogen oxide emissions and comply with many regional air quality standards.

Q6: What fuel and venting requirements apply?
A: This furnace runs on natural gas (convertible to propane with a kit) and requires metal flue venting typical of 80% AFUE units.

Q7: What are its physical and electrical specs?
A: Cabinet size is about 21″ W × 28″ D × 33‑3/8″ H; it operates on 115 V single‑phase power with recommended breaker/amp protection per installation manual

Maintenance Tips

• Replace Air Filters Every 1–3 Months – Regularly change filters to keep airflow strong, protect the blower, and prevent overheating; restricted airflow reduces efficiency and can stress components.

• Annual Professional Inspection – Have a certified HVAC technician check burners, heat exchanger, ignition system, gas pressure, and venting to ensure safe, reliable heating and optimal 80% AFUE performance.

• Keep Vents & Surroundings Clear – Clear dust and debris from around the furnace, intake vents, and exhaust paths so airflow and combustion air supply aren’t restricted.

• Check Thermostat & Controls – Test thermostat accuracy and electrical connections; proper staging improves comfort and efficiency.

• Inspect Igniter & Flame Sensor – Accumulated residue on these parts can cause startup issues; cleaning or inspection during service helps reliable ignition.

• Verify Exhaust Venting (Metal Flue) – Ensure metal flue vent connections are secure and unobstructed; proper venting is critical for safe combustion byproducts removal.

• Document All Maintenance – Track filter changes and professional service visits to support warranty coverage and help troubleshoot issues later.