Carrier Infinity® Series Greenspeed® 98 – 59MN7 Review

The Infinity Greenspeed 98 – 59MN7 is a top-tier furnace from Carrier. It uses Carrier’s unique Greenspeed Intelligence technology to improve performance and efficiency. The result is precise heating that optimizes indoor climate control and the energy-efficiency of the system.

When you opt for the Infinity Greenspeed 98 – 59MN7, you know that you are investing in a premium product that will provide seamless performance and excellent energy-efficiency.

This review of the Infinity Greenspeed 98 – 59MN7 will go over the important aspects of this furnace, including its top features, specifications, efficiency rating, warranty details, average prices, and model comparisons. This will help you decide if this is the right furnace for your home.

About the Infinity Greenspeed 98 – 59MN7

Average Price (installed): $7,500 to $8,100

Top Features

• Excellent high-efficiency rating for great energy savings
• Secondary heat exchanger for less heat loss and fuel waste
• Hot surface ignition that’s reliable and doesn’t waste gas
• Potentially eligible for various rebates
• Compatible with multiple Carrier technologies and features
• Quiet operation
• Excellent humidity control

The Bottom Line

A modulating gas valve and variable-speed blower motor enable this furnace to make incremental adjustments to the heating output. What this means for your house is that the furnace will always be working at a low level to keep every inch of your home at the perfect temperature, without wasting fuel and energy.

Furthermore, this furnace can be paired with Carrier’s smart thermostat, the Infinity System Control, to achieve Greenspeed Intelligence technology, which maximizes the system’s ability to perform efficiently.

This premium product is made for discerning buyers who are comfortable investing extra dollars for their home heating requirements, but it will deliver ideal indoor comfort through many winters.

In-Depth Review

Infinity Greenspeed 98 – 59MN7 Product Specifications

• AFUE: 98.5 percent
• Burner type: Modulating
• Blower type: Variable-speed
• ENERGY STAR rated? Yes
• Price range: $7,500 to $8,100

Features Overview

The Infinity Greenspeed 98 – 59MN7 is compatible with most of Carrier’s exclusive technologies. The Ideal Humidity System and SmartEvap™ technology work with your heat pump/air conditioner to aid in summer dehumidification.

The ComfortFan™ technology allows for multiple fan-speed choices in Constant ON mode, which can make regulating airflow and humidity a breeze.   

Plus, when you pair this furnace with Carrier’s Infinity System Control, you get access to diagnostics that enable easy troubleshooting and self-configuration.

Other Key Features

• Variable-speed blower boosts SEER efficiency in summer when paired with the right air conditioner
• Has Carrier’s Comfort Heat Technology thanks to the modulating burner
• Supports single- and multiple-zone Infinity Systems Controls
• Can easily be connected to a humidifier or electronic air cleaner
• Can be used with propane and natural gas

Warranty Information

There's a lifetime heat exchanger and 10-year parts warranty for the Infinity Greenspeed 98 – 59MN7. This is decent but not exceptional coverage, especially for a high-end furnace model like this one.

Just make sure you register the furnace within 90 days of installation, otherwise the warranty terms will be even shorter.

Comparable Models by Carrier

Model Comparison by Price: 59MN7 versus Performance 96 – 59TP6

The Infinity Greenspeed 98 – 59MN7 is Carrier’s priciest furnace. By comparison, the Performance 96 – 59TP6 tends to cost between $5,000 and $5,600. You will have to sacrifice some efficiency and performance, but for many homeowners, the Performance model might have better value.

The Performance 96 – 59TP6 is a two-stage furnace with a variable-speed blower motor, secondary heat exchanger, and AFUE of 96.5 percent.

Even though it’s not the premier unit, it still offers excellent efficiency, heating comfort, and energy savings. For a few thousand dollars less, you could get a high-performance furnace that will save you plenty on heating bills over many winters.

Model Comparison by Features: 59MN7 versus Comfort™ 92 – 59SC2

The Infinity Greenspeed 98 – 59MN7 is Carrier’s top-of-the-line unit, so no other model has as many features as this. So let’s have a look at what you get when you spend less on a Carrier.

The Comfort 92 – 59SC2 is their entry-level model, and you could save thousands of dollars buying this furnace instead of the premier unit.

However, the Comfort model is only a single-stage furnace with a multi-speed blower motor, it only has an AFUE of 92.1 percent, and it’s not compatible with the Infinity System Control or several other Carrier technologies.

What all this means is the Comfort furnace won’t be as capable of keeping your whole house at the right temperature, especially larger homes, it won’t save you as much on energy bills, it won’t manage humidity as well, and it probably won’t be eligible for rebates.

Model Comparison by Tier: 59MN7 versus Infinity 96 – 59TN6

The Infinity 96 – 59TN6 is another premium-tier furnace from Carrier, but it’s not as sophisticated as the Infinity Greenspeed 98 – 59MN7. The Infinity 96 only has a two-stage burner, meaning it has two speeds instead of multiple ones that can be adjusted incrementally, which is what the Infinity 98’s modulating burner does.

The Infinity 96 is also less efficient, coming in with an AFUE of 96.7 percent, which is only marginally better than most of Carrier’s entry-level and mid-range furnaces.

Finally, the Infinity 96 doesn’t have Greenspeed Intelligence capabilities, though it is compatible with the rest of the technologies that the Infinity 98 is.