| Square Footage | Furnace BTU |
|---|---|
| 1,000-1,200 sq. ft. Home | 40,000 - 60,000 BTU |
| 1,200-1,500 sq. ft. Home | 60,000 BTU |
| 1,500-1,800 sq. ft. Home | 60,000 - 80,000 BTU |
| 1,800-2,500 sq. ft. Home | 80,000 - 100,000 BTU |
| 2,500-3,500 sq. ft. Home | 100,000 to 120,000 BTU |
Please note: The Goodman GD9T80 gas furnace has been designated as limited inventory by the manufacturer. However, it may still be available for purchase through select distributors and HVAC contractors for a limited time.
The Goodman GD9T80 is a dependable and cost-effective gas furnace built for homeowners who value consistent heating, quiet performance, and energy efficiency. With an 80% AFUE (Annual Fuel Utilization Efficiency) rating, this model offers reliable warmth while keeping energy bills manageable — an ideal balance of performance and affordability for homes in regions with moderate winter conditions.
This review explores the features, performance, benefits, and warranty coverage of the Goodman GD9T80 to help you determine if it’s the right furnace for your home.
AFUE Rating: 80%
Burner Type: Two-stage
Blower Type: Multi-speed ECM
Heating Capacity: 40,000 – 67,000 BTUs
ENERGY STAR® Certified: No
Two-stage gas valve for optimized efficiency and comfort
Multi-speed ECM circulator motor delivers smooth, quiet, and consistent airflow
SureStart® Silicon Nitride igniter for enhanced reliability and longer lifespan
Self-diagnostic control board simplifies maintenance and troubleshooting
Low constant fan speed maintains steady air circulation for even heating
Compatible with humidifiers and electronic air cleaners (EACs) to improve indoor air quality
The Goodman GD9T80 delivers 80% AFUE efficiency, meaning 80% of the fuel is converted into usable heat while only 20% escapes through exhaust. Although not as high as premium 90%+ AFUE models, this furnace provides dependable and affordable heating for homes in areas with milder climates.
Its two-stage gas valve operates primarily at a lower setting, minimizing energy usage and temperature swings. When extra heat is required, it automatically shifts to the higher stage for stronger performance.
The multi-speed ECM blower motor ensures optimal airflow, enhancing both comfort and efficiency while keeping noise levels low — perfect for homeowners who prefer quiet operation.
Reliable, long-lasting performance thanks to Goodman’s durable construction
Energy-efficient heating through a smart two-stage gas valve system
Quiet operation with smooth, controlled airflow from the ECM motor
Extended igniter lifespan with the durable SureStart® Silicon Nitride igniter
Improved indoor air quality when paired with EACs or humidifiers
Easy maintenance with a built-in self-diagnostic control board that stores error codes
Lower operating costs compared to older single-stage furnace models
Consistent comfort from steady, balanced air circulation throughout the home
Goodman backs the GD9T80 with a strong warranty package for lasting peace of mind:
10-Year Limited Parts Warranty
Lifetime Heat Exchanger Warranty
To maintain full warranty protection, the furnace must be installed by a licensed HVAC professional and registered within 60 days of installation.
The Goodman GD9T80 is a reliable, quiet, and energy-efficient gas furnace designed to deliver dependable warmth season after season. With its two-stage operation, multi-speed ECM blower, and durable Silicon Nitride igniter, it offers exceptional comfort and value at an affordable price.
While it doesn’t reach the efficiency of high-end condensing furnaces, its 80% AFUE rating makes it a smart, economical choice for homeowners in areas with moderate winter temperatures.
If you’re seeking a dependable, quiet, and budget-friendly furnace that provides steady heat and smooth airflow, the Goodman GD9T80 is a great option to consider.
