Best Furnace Brands: An Honest Take From People Who Repair All of Them

Where we are coming from

We are not a dealer for any manufacturer, and we repair every brand that shows up in a Washtenaw or Wayne County basement. That gives us a view most brand rankings do not have: we see which furnaces fail at 8 years and which run at 25, and we see what the repair looks like when they do. The honest conclusion, after years of doing this, is that brand explains a small part of how a furnace performs. Sizing, duct design, gas pressure setup, combustion tuning and whether the installer pulled a permit and commissioned the unit explain most of the rest. A mid-tier furnace installed well outlasts a premium furnace installed badly, every time.

With that said, there are real differences between the lines, mostly in how parts are sourced and priced. Here is what we have seen.

The families: who shares parts with whom

The residential furnace market in the United States is a handful of parent companies selling under multiple names, and knowing the family tells you about parts.

• Carrier, Bryant and Payne are one family. The furnaces share control boards, inducers, gas valves and heat exchanger designs, with Carrier at the top on features and finish, Bryant in the middle, and Payne as the value line. A part for a 2012 Bryant is the same part for the equivalent Carrier.
• Trane and American Standard are one family under the same parent. Essentially identical furnaces with different badges and dealer networks. Trane markets harder; American Standard is often priced a bit lower for the same unit.
• Goodman, Amana and Daikin are one family. Goodman is the value line, Amana is the same equipment with a longer warranty package, and Daikin is the parent's premium brand with inverter technology.
• Rheem and Ruud are one family. Same furnaces, two names, with Ruud historically sold through a different channel.
• York, Luxaire and Coleman are one family under Johnson Controls.
• Lennox stands alone, with Armstrong Air, Ducane and AirEase as its secondary brands sharing some but not all designs.

If you have one of these and a contractor tells you parts are hard to get, ask which family it is in. Most of the time the part is common across the family and stocked locally.

What actually differs

Proprietary versus universal parts. Most brands use ignitors, flame sensors, pressure switches, capacitors and blower motors that have universal equivalents, so a tech can fix a 2008 Goodman or a 2010 Bryant from truck stock. Lennox is the brand that most often uses proprietary parts, especially control boards, inducers and some blower assemblies on its higher-end lines, which means ordering from a Lennox parts center and sometimes waiting. Lennox furnaces are well built; the tradeoff is in the repair logistics, and that matters more at year 12 than on install day.

Heat exchanger design and warranty. Every major brand offers a lifetime or 20-year heat exchanger warranty on most residential furnaces, with 10-year parts when registered. Secondary heat exchangers on condensing furnaces are stainless on all of them. We do not see a consistent exchanger-failure pattern by brand; we see a pattern by oversizing and by condensate neglect.

Build quality within a brand. Every family has a builder-grade line and a premium line, and the gap within a brand is bigger than the gap between brands at the same tier. A base single-stage Carrier and a base single-stage Goodman are more alike than a base Carrier and a top-of-the-line Carrier Infinity. When you compare quotes, compare tiers, not badges.

Controls and communicating systems. Carrier Infinity, Lennox iComfort, Trane ComfortLink and similar premium systems use communicating thermostats and boards that talk to each other over a data bus. They offer the best modulating control and the tightest temperature hold. They also lock you into that brand's thermostat and parts, and a failed communicating board on a 10-year-old system is a brand-specific repair. Single-stage vs two-stage vs variable-speed covers whether that level of control is worth it for your house.

Price. Goodman and Amana, and the value lines of each family (Payne, Coleman, Ruud, Ducane), sit at the lower end of typical market pricing for a given AFUE and stage. Carrier, Trane and Lennox premium lines sit at the top. The equipment-only difference between a value-tier and a premium-tier 96% two-stage furnace, in Washtenaw County market terms, can be in the high hundreds to a couple of thousand, and a meaningful portion of that is dealer margin and marketing rather than steel.

What we see in local basements

Goodman furnaces from the 2000s subdivision boom in Canton, Van Buren and Pittsfield are everywhere, and they are running fine when they were sized right and serviced; the stigma from the 1990s does not match what we see on the trucks today. Carrier and Bryant 80% furnaces from the 1990s in Westland and Livonia ranches are routinely 25-plus years old and still heating. Lennox condensing furnaces from the mid-2000s are solid but we order boards for them. Trane furnaces run long; their blower doors and cabinet fit are the best in the business, which sounds trivial until you are the one servicing it. Rheem and Ruud have had a few board and ignitor generations that we replace often, and the current ones are fine. York has had quieter years and louder ones.

What all of that adds up to is that we cannot tell you a brand to buy, because the pattern we actually see is: the furnace that was sized from a Manual J, installed with proper gas pressure and temperature rise, and given a drain that does not freeze is the one that lasts, and its badge is nearly irrelevant.

What to ask instead of "which brand"

• Is the size based on a load calculation or on the old furnace?
• What is the AFUE, the stage, and the blower type, and what does the next tier up cost?
• What is the parts and heat exchanger warranty, and will you register it for me?
• Is a mechanical permit pulled and will the install be inspected? HVAC permits in Ypsilanti and Washtenaw County explains why that matters.
• Will you measure gas pressure, temperature rise and static pressure at startup and leave me the numbers?
• Who services it after the install, and how fast?

A contractor who answers all of those with specifics will install any of the major brands well. One who leads with the badge and a brochure and skips the load calculation will install the best brand poorly.

Our own stance

We install furnaces from the major families based on what fits the house, the budget and the parts situation, and we will tell you when a value-tier unit is the right call for a 1,100-square-foot ranch that does not need a modulating burner. We are also happy to quote against a brand-specific dealer; we have had homeowners come to us for a second opinion and walk away keeping their current furnace. If you want the full picture for your house, a furnace installation estimate from us includes the load calculation and a straight comparison of two or three equipment options at different tiers, with the tradeoffs written down.

For the question that usually comes right after this one, repair or replace your furnace is the place to go.