Carrier · Infinity Series
Carrier Infinity 80 (59MN7-80)
80% AFUE Two Stage gas furnace with a variable-speed ECM blower.
Specifications
AFUE Efficiency
80%
Heating Stage
Two Stage
Blower Motor
variable-speed ECM
Sound Level
64 dB
ENERGY STAR
No
BTU Range
40,000–120,000
Heat Exchanger Warranty
Lifetime
Parts Warranty
10 years
Key features
- Two-stage gas valve
- Low/high heat for even comfort
- Quieter low-fire operation
- Improved humidity control
Pros & cons
Pros
- Even, comfortable heat
- Quieter than single-stage
- Better efficiency
Cons
- Higher cost than single-stage
Categories
Infinity 80 (59MN7-80) reviews
Quiet and efficient — bills dropped
"Survived our first -30 cold snap without a hiccup. Steady, warm, and the variable-speed blower is so quiet we forget it's running."
— Sarah R., Burnaby · 2025-05-02
Smooth install, great comfort
"The monthly payment made the high-efficiency model affordable. Rebate covered a big chunk and the savings on our bills basically cover the payment."
— David G., Surrey · 2025-06-09
Exactly what we needed
"Replaced our 20-year-old furnace and the difference is night and day. The house heats evenly and it's noticeably quieter. Our gas bill dropped about 25% over the winter."
— Emily M., Toronto · 2025-07-16
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Modulating · Lifetime heat exchanger
98.5%
AFUE
58
dB
4.8
Rating
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$9,100 – $10,900
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Two Stage · Lifetime heat exchanger
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AFUE
63
dB
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Rating
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$7,800 – $9,600
Performance 96 (59TP6)
Two Stage · 20 yr heat exchanger
96%
AFUE
66
dB
4.5
Rating
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$6,700 – $8,500