The Carrier Infinity® 98 Furnace (model 59MN7) is Carrier’s top-of-the-line furnace, designed for homeowners who want exceptional efficiency, whisper-quiet heating, and advanced smart controls. With AFUE ratings up to 98.5%, it’s one of the most efficient gas furnaces available today.
The Infinity 98 pairs modulating gas valve technology with a variable-speed blower motor, adjusting heat output in 1% increments to maintain consistent indoor comfort. Carrier’s proprietary Greenspeed® Intelligence continuously adapts to your home’s needs for precise temperature and humidity control.
The Infinity 98 packs Carrier’s most advanced furnace technology into a durable, high-performance system. Below are its key specifications that highlight efficiency, comfort, and warranty coverage.
| Feature | Specification |
|---|---|
| Efficiency | Up to 98.5% AFUE |
| Gas Valve | Modulating (1% increments) |
| Blower | Variable-speed ECM |
| Smart Tech | Greenspeed® Intelligence |
| Noise Level | Ultra-quiet, variable-speed operation |
| Warranty | 10-year parts + lifetime heat exchanger (with registration) |
When shopping for a new furnace, it helps to see how top models stack up side by side. The Carrier Infinity® 98 goes head-to-head with the Trane XC95m and the Lennox SLP98V, all of which are premium, high-efficiency furnaces. Each offers modulating gas valves and variable-speed blowers, but Carrier sets itself apart with its exclusive Greenspeed® Intelligence technology.
| Model | AFUE | Gas Valve/Blower Type | Noise Level | Cost (Installed) | Ideal For |
|---|---|---|---|---|---|
| Carrier Infinity 98 | Up to 98.5% | Modulating + Variable-Speed | Very Quiet | $6,500 to $12,000 | Premium comfort and efficiency |
| Trane XC95m | Up to 97.3% | Modulating + Variable-Speed | Quiet | $6,000 to $11,000 | Reliable, long-lasting heating |
| Lennox SLP98V | Up to 98.7% | Modulating + Variable-Speed | Whisper-Quiet | $7,000 to $12,500 | Ultra-high efficiency homes |
The Carrier Infinity 98 furnace typically costs between $6,500 to $12,000 installed, depending on:
While Carrier furnaces sit at the higher end of the market, the Infinity 98 delivers long-term value through reduced energy bills, exceptional comfort, and robust warranties.
Furnace installation costs vary widely across the U.S. due to factors like labor rates, regional demand, permitting requirements, and the availability of utility or state rebate programs. Carrier systems, including the Infinity 98, tend to be more affordable in regions with lower labor costs and steady but moderate demand, such as the Midwest and parts of the South. By contrast, homeowners in higher-cost areas like California, New York, Massachusetts, Alaska, and Hawaii often face premium pricing driven by higher labor expenses, stricter codes, and strong competition for licensed contractors.
On average, installing a Carrier Infinity 98 furnace can cost 20% to 30% more in these high-demand regions compared to the national average. However, rebates and incentives for ENERGY STAR®-qualified high-efficiency furnaces are commonly available, which can help reduce upfront costs.
For the most accurate estimate, it’s best to get multiple local quotes and ask about regional rebate programs that may offset installation expenses.
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With proper installation and routine maintenance, the Carrier Infinity 98 can last 15 to 20 years or more. Carrier recommends annual professional inspections to maintain peak efficiency, which include:
Because of its variable-speed and modulating design, the Infinity 98 also experiences less wear and tear compared to single-stage models, helping extend its lifespan.
Homeowners praise the Infinity 98 for its quiet operation, noticeable comfort improvements, and strong efficiency savings. Carrier’s reputation for quality and service also plays a big role in customer satisfaction. Some users note that Carrier’s premium pricing and reliance on certified dealers can make upfront costs higher than alternatives, but most agree the long-term comfort and efficiency make it worthwhile.
“I replaced my 32 year old Infinity system with a new one. This furnace can handle all 6 zones with no issues. Well worth the investment.” — Homeowner Review
“The Carrier Infinity® 98 Gas Furnace with Greenspeed® Intelligence offers unmatched comfort and efficiency. Its modulating gas valve adjusts in 1% increments between 40–100% capacity, delivering precise, consistent heat and reducing temperature swings.” — Business Review
“Our ratings would receive a 5 BUT, we are not completely happy with the thermostat, we find it very not user friendly.” — Homeowner Review
If you’re looking for a premium, high-efficiency furnace with smart comfort technology and ultra-quiet operation, the Carrier Infinity 98 is an outstanding choice. While it comes with a higher upfront cost, the long-term energy savings, precise climate control, and durability make it a worthwhile investment for homeowners in colder regions or anyone seeking the highest level of comfort.
Ready to upgrade to a high-efficiency furnace? Get matched with top-rated local pros for a personalized quote.
