Is a Trane or Carrier furnace better for a Minnesota home?
Trane and Carrier both sell full furnace lineups, from basic single-stage 80% units up to variable-speed condensing models, and both are all over Twin Cities basements. When you compare quotes, look first at which furnace each quote is for. A single-stage Carrier and a modulating Trane differ from each other far more than the two brands do. This page is about furnaces and heating. If you are shopping for central air or a heat pump, our Carrier vs Trane cooling comparison covers that side.
How the two furnace lineups line up
Carrier sorts its equipment into Infinity, Performance and Comfort series. Trane groups systems as Premier, Priority and Choice, and it has been moving from model codes like S9V2 and XC95m to plain names such as "97 Two-Stage Variable Speed." Older paperwork and most online reviews still use the codes, so the same furnace can show up under two names.
At the top of Carrier's list sits the Infinity 98. Its gas valve adjusts in 1% steps, it pairs with a variable-speed blower, and it is built to run with the Infinity System Control. Carrier also sells two-stage models in both the Infinity and Performance lines.
Trane's modulating furnace is the 96 Modulating Variable Speed, the model once sold as the XC95m, and it communicates over Trane's ComfortLink II. Trane's 97 Two-Stage Variable Speed, the old S9V2, is the one people often assume is modulating. It is two-stage, and it uses stainless steel for both the primary and secondary heat exchangers. You can read more about each brand on our Trane and Carrier pages.
Modulating, two-stage or single-stage in a Minnesota winter
The sub-zero design day gets all the attention, but most heating hours in Minnesota fall on days in the teens, twenties and thirties. On those days a single-stage furnace fires at full output, overshoots, shuts off and lets the house drift. You feel it as warm blasts, cool gaps and a bedroom over the garage that never quite catches up.
A two-stage furnace spends most of the winter on low fire with the blower running slow, which already fixes most of that. A modulating furnace goes further and trims its output to match the load, so it runs long and quiet and holds temperature within a degree or so. It earns its price in homes where floors or wings heat unevenly, like a 1970s split-level with the thermostat in the upper hallway. In a tight 2000s house that is sized correctly, a good two-stage variable-speed furnace gets you most of the same comfort for less money.
Efficiency is close either way. Our AFUE explainer walks through why a 96% and a 98% furnace burn nearly the same gas.
What does switching from an 80% to a 90%-plus furnace involve?
This matters more than the brand in a lot of Minneapolis and Saint Paul houses. An 80% furnace from either company vents hot exhaust up a metal flue or chimney. A condensing furnace from either company vents cool, wet exhaust through PVC out a side wall or the roof, needs a condensate drain, and on direct-vent installs pulls combustion air through a second pipe.
Going from 80% to 90%-plus usually means new venting. It can also leave a gas water heater alone in a chimney sized for two appliances, and that chimney may need a liner. In winter, a side-wall vent has to sit clear of drifting snow, and a condensate line run through a cold crawlspace or garage can freeze. None of that changes with the logo. It changes with how carefully the install is planned. Our furnace installation page covers what we check before we quote a replacement.
What do Trane and Carrier controls lock you into?
At the top of both lines, you are buying into a brand's control system. The Infinity System Control talks to Infinity equipment over a four-wire communicating bus. Trane's UX360 thermostat only works with Trane's communicating variable-speed systems. If one of those controls fails in year twelve, the replacement comes from the same brand. Their non-communicating furnaces run on an ordinary thermostat that matches the staging.
The everyday repairs are the same on both: igniters, flame sensors, pressure switches, inducer motors, blower motors and control boards. Communicating boards and variable-speed motors cost more to replace than their basic counterparts, on either brand.
Warranty terms differ in the fine print. Trane gives its Registered Limited Warranty, typically 10 years on parts, when the furnace is registered within 60 days. Carrier gives a 90-day window and lets you pick 10 years of parts coverage or 5 years of parts plus 3 years of labor. We register what we install, and our installs add a 2-year labor warranty on top of the manufacturer's parts coverage. For a longer take on how these two furnaces hold up, see our Trane vs Carrier furnace review.
Does sizing matter more than Trane vs Carrier?
A correctly sized Carrier and a correctly sized Trane will both heat a Minnesota house through a -20°F night. An oversized furnace of either brand will short-cycle, run hot at the registers and wear out its igniter and limit switch early. So we size replacements with a Manual J load calculation instead of copying the old nameplate, check duct static pressure and plan the venting before we write a number down. In our experience that work, plus having someone nearby who can service the equipment, affects comfort and repair bills far more than the brand.
Installed prices follow the furnace type more than the badge: roughly $4,500–$6,000 for an 80% AFUE furnace and $6,500–$9,500 for a 96–98% AFUE furnace. If your current furnace is acting up, a service call is a $79 trip charge, waived when you approve the repair. Call 612-429-3465 to book.
Questions
Is a Trane or Carrier furnace quieter?
At the same staging they are close. Noise comes mostly from how hard the blower works and how the furnace starts. A modulating or two-stage furnace lights on low fire and ramps the blower slowly, so it is quieter than any single-stage model. Undersized return ducts make the loudest whoosh, and that is an install problem on either brand, not a factory one.
Does a modulating furnace burn much less gas than a two-stage?
Not much. AFUE tells you how much of the fuel turns into heat, and a two-stage furnace in the high 90s and a modulating one in the high 90s are nearly the same on that score. What modulation buys you is steadier temperatures, fewer cold spots on the far side of a split-level and longer, quieter run times. Buy it for comfort, not for a big drop in the gas bill.
Can I keep my current thermostat with a new Trane or Carrier furnace?
On most single-stage and two-stage models, yes, as long as it matches the staging. The communicating tops of both lines are different: Carrier's Infinity 98 needs the Infinity System Control, and Trane's UX360 only works with Trane's communicating variable-speed systems. If you want to keep a thermostat you already like, tell us before we quote.
Which brand has the better furnace warranty?
Both give roughly 10 years on parts when the furnace is registered on time. Trane's window is 60 days and Carrier's is 90, and Carrier lets you trade some parts years for 3 years of labor coverage. Registration is the part people miss. On top of the manufacturer's coverage, our installs carry a 2-year labor warranty.
Do you repair both Trane and Carrier furnaces?
Yes. We service and repair both brands, including their communicating models. A service call is a $79 trip charge, waived when you approve the repair. You get a written, flat-rate price before any work starts. Call 612-429-3465; we are open 7 days a week, 7am to 9pm.