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| 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 |
Amana AC9S80 Review: The Amana AC9S80 is an 80% AFUE gas furnace built for homeowners who prioritize dependable heating, simple operation, and long-term durability over high efficiency. Although this model has been discontinued, it is still commonly found in existing homes and often considered when evaluating repair vs replacement decisions.
If you’re dealing with an older furnace and want to understand whether it’s still worth keeping—or upgrading—this model serves as a useful benchmark.
The AC9S80 makes sense if:
It’s not ideal if:
Compared to modern furnaces:
👉 This makes the AC9S80 more relevant as a baseline or temporary solution, not a long-term efficiency upgrade.
Want a more accurate estimate based on your home and location?
Thinking about replacing an older furnace like the AC9S80?
Get a free quote and compare modern high-efficiency options for your home.
The AC9S80 is designed for straightforward, consistent heating.
👉 In real use:
Reliable heating, but less control over temperature variations
Estimate your monthly and yearly heating costs based on your furnace efficiency.
👉 Start Operating Cost Calculator
The AC9S80 has an 80% AFUE rating, which is considered standard efficiency. For a better understanding of how heating efficiency works in Canadian homes, refer to this guide on furnace efficiency and heating systems in Canada.
This means:
👉 Upgrading to a 96%+ furnace can significantly reduce energy bills.
See how much you could save by upgrading to a high-efficiency furnace.
One of the strongest aspects of this furnace:
👉 Simpler systems often result in lower long-term maintenance issues
| Specification | Details |
|---|---|
| AFUE | 80% |
| Burner Type | Single-stage |
| Blower Motor | Multi-Speed ECM |
| Heating Capacity | 32,000 – 96,000 BTU |
| Height | ~34.5 inches |
| Width | ~17.5–24.5 inches |
| Depth | ~28 inches |
| Weight | ~120–160 lbs |
| Max ESP | ~0.5 in. WC |
| ECM Motor HP | 1/2 – 3/4 HP |
| Airflow Range | ~800 – 1800 CFM |
| Noise Level | ~55–70 dB |
| Gas Connection | 1/2 inch |
As covered in this Amana AC9S80 Review, the unit is designed for straightforward installation and broad compatibility:
Amana offered solid protection for this model:
👉 While not as strong as newer lifetime unit replacement warranties, the Amana AC9S80 warranty still provides reliable long-term coverage.
👉 Key takeaway:
The AC9S80 is reliable—but outdated in efficiency compared to newer systems
From an HVAC perspective:
👉 For most homeowners today, upgrading provides better comfort and long-term savings
Consider replacing if:
Keep it if:
Still unsure whether to repair or replace your furnace?
👉 Take the Repair or Replace Quiz
The Amana AC9S80 is a dependable, older-generation furnace that delivers consistent performance and durability.
However, it’s best viewed today as a baseline system—useful for comparison, but not ideal for new installations due to its lower efficiency.
Looking to upgrade from an older furnace like the AC9S80?
Request a free installation quote and explore high-efficiency options tailored to your home.
Q: Is the Amana AC9S80 still available?
No, this model has been discontinued but may still be found in existing homes.
Q: Is the AC9S80 efficient?
It has 80% AFUE efficiency, which is standard but lower than modern systems.
Q: Should I replace my AC9S80 furnace?
If it’s aging or inefficient, upgrading to a 96%+ furnace is usually recommended.
Q: What type of furnace is the AC9S80?
It is a single-stage gas furnace with a multi-speed ECM blower motor.
