Goodman - 100,000 BTU 92% Gas Furnace - 21" Width - Upflow / Horizontal - Single Stage - 115V - R32 - GR9S921005CN

Goodman - 100,000 BTU 92% Gas Furnace - 21" Width - Upflow / Horizontal - Single Stage - 115V - R32 - GR9S921005CN

The GR9S921005CN Goodman gas furnace features high-quality construction and efficient operation at a great value. The GR9S921005CN 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 GR9S921005CN.

Features

• This furnace is ideal to heat a medium to large house (depending on climate)
• 100,000 BTU 92% efficient natural gas furnace
• Requires plastic/PVC flue venting
• Complies with Clean Air Act New Refrigerant Requirements
• 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

• High‑Efficiency Heating You Can Trust
  The Goodman GR9S921005CN delivers 100,000 BTU with a 92 % AFUE rating, meaning most of the fuel you pay for turns into usable heat—helping lower energy costs while keeping homes warm in cooler months.

• Straightforward Single‑Stage Performance
  With a single‑stage gas valve, this furnace provides consistent, dependable heat output whenever the thermostat calls—ideal for homeowners who want reliable performance without modulation complexity.

• Versatile Installation Options
  Its upflow and horizontal airflow design fits a variety of spaces (attics, basements, closets) without the need for major duct modifications, granting more flexibility in retrofit or new HVAC layouts.

• Quiet, Efficient Air Distribution
  The multi‑speed ECM blower motor improves airflow control and lowers energy use compared with traditional motors, resulting in quieter circulation and better whole‑home comfort.

• Durable Construction for Long Service Life
  Heavy‑gauge steel cabinet, aluminized heat exchanger, silicon nitride igniter, and self‑diagnostic control board help ensure reliable season‑after‑season performance with easier troubleshooting for HVAC pros.

• Modern Compliance & R‑32 Readiness
  Designed to meet current refrigerant and emissions standards and built for compatibility with R‑32‑ready HVAC systems, this furnace aligns with emerging regulatory trends.

Q&A

Q1: What heating capacity and efficiency does this furnace deliver?
A: The Goodman GR9S921005CN provides 100,000 BTU input (~92,100 BTU output) with a 92% AFUE rating, meaning most fuel is converted to heat for efficient performance.

Q2: What type of operation does it use?
A: It uses a single‑stage gas valve, delivering consistent, full‑capacity heat whenever the thermostat calls for warmth.

Q3: What blower motor and airflow features are included?
A: The furnace includes a multi‑speed ECM blower motor (9‑speed) for smoother airflow control, quieter operation, and improved comfort distribution.

Q4: What installation orientations are supported?
A: It supports upflow and horizontal installation, giving flexibility for attics, basements, closets, or crawl spaces.

Q5: What are the key construction features?
A: Features include a heavy‑duty aluminized steel primary heat exchanger, stainless secondary heat exchanger, silicon nitride igniter, self‑diagnostic control board, and color‑coded low‑voltage terminals for easier servicing.

Q6: What are the physical dimensions and electrical specs?
A: The furnace measures approx. 21″ W × 28.75″ D × 34.5″ H, weighs around 141 lb, and operates on 115 V single‑phase, 60 Hz power.

Q7: What fuel and venting are required?
A: It runs on natural gas (field‑convertible to propane with an LP kit) and requires PVC/plastic flue venting typical of high‑efficiency equipment.

Maintenance Tips

• Replace Air Filters Every 1–3 Months – Regular filter changes maintain strong airflow, protect the blower, and prevent strain on internal components. Dirty filters reduce efficiency and can increase operating costs.

• Annual Professional Inspection – Have a licensed HVAC technician check burners, heat exchanger, gas pressure, PVC venting, and combustion safety to preserve 92 % AFUE performance and safety.

• Clean Around the Furnace – Vacuum dust, lint, and debris near the furnace and intake vents; clear supply/return grilles and ductwork to support balanced airflow.

• Test Thermostat & Safety Devices – Verify thermostat accuracy and test carbon monoxide (CO) detectors to ensure proper operation and comfort control.

• Inspect Exhaust & PVC Vent Lines – Ensure the PVC intake/exhaust pipes are free of blockages (leaves, nests, ice) and properly sealed to prevent combustion hazards.

• Check Flame Sensor & Igniter – Have a pro clean the flame sensor and test the hot surface igniter annually; these parts are critical for reliable ignition and efficient combustion.

• Document Maintenance – Keep records of filter changes, inspections, and professional service visits to maintain warranty coverage and help troubleshoot issues.