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 GR9S80-U Review

Goodman GR9S80-U Review

AFUE: Up to 80%
Burner Type: Single-Stage
Blower Type: Multi Speed ECM Motor
Price: $4,000 – $4,600
BTU Output: 36,800 to 110,400
Free Instant Quote

Goodman GR9S80-U: Reliable and Affordable Heating for Moderate Climates

The Goodman GR9S80-U is a dependable single-stage gas furnace designed to provide quiet, efficient, and cost-effective heating. With an 80% AFUE rating, it’s an ideal option for homeowners in areas with mild to moderate winter conditions who want reliable warmth without a high upfront cost.


Overview

  • AFUE Rating: 80%

  • Burner Type: Single-stage

  • Blower Type: Modulating draft inducer

  • Heat Exchanger: Stainless-steel dual-diameter tubular

  • Heating Capacity: 40,000 – 67,000 BTUs

  • ENERGY STAR® Certified: No


Key Features

  • Durable Stainless-Steel Heat Exchanger: Built for long-lasting performance and efficient heat transfer.

  • Single-Stage Gas Valve: Delivers consistent and dependable heating output.

  • Reliable Hot-Surface Igniter: Ensures quick and trouble-free ignition.

  • Quiet Operation: The modulating draft inducer reduces operating noise and enhances comfort.

  • Self-Diagnostic Control Board: Simplifies maintenance and troubleshooting for technicians.


Performance and Efficiency

With an 80% AFUE rating, the GR9S80-U converts 80% of its fuel into usable heat. While not the highest efficiency model, it offers excellent value for homes in regions where extreme cold is rare.

The single-stage operation runs at full capacity whenever heating is needed, ensuring steady warmth throughout your home. Meanwhile, the modulating draft inducer fine-tunes airflow for better performance and quieter operation.

The stainless-steel heat exchanger is designed for superior durability and corrosion resistance, ensuring years of dependable service.


Benefits of the Goodman GR9S80-U

Reliable Heating: Consistent warmth with simple, proven single-stage operation.
Durable Construction: Stainless-steel components extend the furnace’s lifespan.
Quiet Comfort: Sound-reducing design and modulating inducer keep noise levels low.
Low Maintenance: Hot-surface igniter and diagnostic board reduce service issues.
Enhanced Air Quality: Compatible with electronic air cleaners (EAC) and humidifiers.
Cost-Effective Performance: Balances efficiency and affordability for everyday use.


Warranty Protection

Goodman backs the GR9S80-U with excellent warranty coverage for added peace of mind:

  • 10-Year Limited Parts Warranty

  • Lifetime Heat Exchanger Warranty

Note: To qualify for full warranty benefits, installation must be performed by a licensed HVAC professional, and registration is required within 60 days of installation.


Final Verdict

The Goodman GR9S80-U offers reliable, quiet, and durable heating at a budget-friendly price. While it doesn’t feature advanced variable-speed or two-stage technology, it excels in simplicity, dependability, and comfort.

If you’re looking for a cost-effective furnace that delivers consistent performance, easy maintenance, and long-lasting value, the Goodman GR9S80-U is a smart investment for your home.