What size furnace should I buy?

Square FootageFurnace BTU
1,000-1,200 sq. ft. Home40,000 - 60,000 BTU
1,200-1,500 sq. ft. Home60,000 BTU
1,500-1,800 sq. ft. Home60,000 - 80,000 BTU
1,800-2,500 sq. ft. Home80,000 - 100,000 BTU
2,500-3,500 sq. ft. Home100,000 to 120,000 BTU
Goodman GD9S80 Review

Goodman GD9S80 Review

AFUE: Up to 80%
ENERGY STAR ®: No
Burner Type: Single-Stage
Blower Type: Multi Speed ECM Motor
Price: $4,000 – $4,600
BTU Output: 36,800 to 110,400
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Goodman GD9S80 Furnace Review: Reliable, Affordable Heating

The Goodman GD9S80 is a single-stage gas furnace engineered to provide consistent, dependable heating at an affordable price. With an 80% AFUE rating, it efficiently converts fuel into heat, making it a cost-effective choice for homes in moderate winter climates.

In this review, we’ll cover its key features, performance, and benefits to help you decide if the GD9S80 is the right furnace for your home.


Goodman GD9S80 Overview

  • AFUE Rating: 80%

  • Burner Type: Single-stage

  • Blower Type: Single-speed draft inducer

  • Heat Exchanger: Heavy-duty aluminized-steel dual-diameter tubular

  • ENERGY STAR Certified: No


Key Features

  • Heavy-duty aluminized-steel heat exchanger: Ensures efficient heat transfer and long-lasting durability

  • Single-stage gas valve: Provides steady and reliable heating

  • Durable hot-surface igniter: Offers dependable ignition for years of use

  • Quiet single-speed draft inducer: Reduces operational noise for a more comfortable home environment

  • Self-diagnostic control board: Simplifies maintenance and troubleshooting

  • Compatible with electronic air cleaners and humidifiers: Supports improved indoor air quality


Performance and Efficiency

The GD9S80’s 80% AFUE rating means 80% of the fuel it consumes is converted into usable heat, making it an economical heating option.

  • Single-stage operation: Runs at full capacity whenever heating is needed, delivering consistent warmth, though it may use more energy than two-stage or variable-speed models.

  • Quiet operation: The single-speed draft inducer ensures smoother airflow while minimizing noise.

  • Durable heat exchanger: The dual-diameter aluminized-steel design enhances heat transfer and long-term reliability, making this furnace a dependable and cost-effective choice.


Benefits of the Goodman GD9S80

  • Reliable and durable: Heavy-duty aluminized-steel heat exchanger for long-lasting performance

  • Consistent heating: Single-stage operation provides steady warmth throughout the home

  • Quiet operation: Single-speed draft inducer minimizes noise

  • Dependable ignition: Durable hot-surface igniter ensures reliable starts

  • Easy maintenance: Self-diagnostic control board simplifies troubleshooting

  • Supports better indoor air quality: Compatible with air cleaners and humidifiers

  • Energy-efficient circulation: Delivers consistent heat without wasting energy


Warranty and Coverage

Goodman backs the GD9S80 with solid warranty protection:

  • 10-year limited parts warranty

  • Lifetime heat exchanger warranty

Note: Warranty is valid only if the furnace is installed by a licensed HVAC professional and registered within 60 days of installation.


Final Thoughts

The Goodman GD9S80 is a reliable, budget-friendly gas furnace that delivers consistent warmth, quiet operation, and durable performance. While it doesn’t offer the advanced efficiency of two-stage or variable-speed models, it remains an excellent option for homeowners seeking a straightforward, cost-effective heating solution.

With its robust aluminized-steel construction, dependable igniter, and self-diagnostic system, the GD9S80 provides lasting comfort and peace of mind. If you want a no-frills, dependable furnace at an affordable price, the Goodman GD9S80 is a strong choice.