Concord at Allied Air
Concord is one of six brands Allied Air Enterprises lists, along with Armstrong Air, AirEase, Ducane, Allied Commercial and MagicPak. Allied Air is a Lennox International company headquartered in Columbia, South Carolina, and Concord says its products are made at a South Carolina facility. As of 2026 the copyright line on the Concord website reads Allied Air Enterprises LLC, "A Lennox International Inc. Company."
Concord sells on value. Its own line is that it's committed to "outstanding heating and cooling value for the home," and when Allied Air launched its 97% two-stage furnaces in 2024, it pitched them to contractors as affordable and easy to install, with accessible serviceability. Expect plain, sensibly built equipment rather than premium extras, which also means fewer specialty parts to wait on.
How do Concord and Ducane furnaces compare?
Concord's closest relative is Ducane. Compare the two catalogs and the model numbers match line for line: the 97G2VK and 92G1EK furnaces, the 7AC17T air conditioner, the 7SHP15V and 7HP19V heat pumps. In June 2024 Allied Air introduced its 97G2E and 97G2V two-stage furnaces under the Concord and Ducane brands in the same announcement.
For you, that means two things. A Ducane installation manual or parts list for your model number applies to your Concord, and our Ducane service page covers the refrigerant detection sensors and blower motors these furnaces share. And parts are easier to find, because each one serves two brands.
What heat exchanger does a Concord furnace use?
Concord says its furnaces use an aluminized steel heat exchanger that is crimped, not welded. Registered, its furnaces carry a limited lifetime heat exchanger warranty; unregistered, 20 years. Either way, the heat exchanger is the part we look at hardest on a Minnesota furnace that runs from October into April, because it's the wall between the flame and the air you breathe.
On a maintenance visit or a no-heat call, we inspect as much of it as we can see, watch the burner flame when the blower starts, and check for carbon monoxide. A flame that jumps or changes color when the blower kicks on is a warning sign. A cracked heat exchanger can leak carbon monoxide, and we will shut off a furnace that's unsafe to run. Our post on cracked heat exchanger symptoms explains what we look for. Minnesota law also requires a working CO alarm within 10 feet of every sleeping room, and our guide to CO detector placement shows where they go.
Two-stage heat and Concord heat pumps
Both of Concord's 97% furnaces are two-stage, and so are two of its 80% models. Concord says the 97G2VK adjusts its output to conditions, and that its variable-speed blower starts slowly before ramping up. In a Minnesota winter, a two-stage furnace spends most of its hours on low fire and goes to high fire on the coldest days. When staging goes wrong, you notice: a furnace stuck on low falls behind at -20°F, and one that jumps to high fire too often runs short, loud cycles. We check the thermostat wiring and settings, the second-stage pressure switch and the gas valve before blaming the control board. Our post on furnace short cycling covers the other causes.
Among Concord's heat pumps, the 7SHP15V is the one to know about. Concord lists it with a variable-capacity compressor, heating operation down to 0°F, a single fan across all sizes and sound levels as low as 57 dBA, and it blows out the side instead of the top. Below zero it needs a partner, so we pair it with a gas furnace as dual fuel or with electric backup heat, and we set it on a stand so drifts and defrost ice can't choke the coil.
Registering, replacing and booking
Register new Concord equipment within 60 days of installation, or within 60 days of closing on a newly built home. Unregistered equipment falls back to a 5-year limited parts warranty and a 20-year heat exchanger warranty.
When a Concord is at the end, we size the replacement with a Manual J load calculation. Installed furnaces run $4,500–$9,500 and heat pumps $7,500–$14,500, with our 2-year labor warranty on top of the manufacturer's parts warranty.
Call 612-429-3465 from 7am to 9pm, seven days a week; no-heat calls get priority. A service call is a $79 trip charge, waived when you approve the repair, and the price is written down before we start.
Concord questions
Who makes Concord furnaces?
Allied Air Enterprises, a Lennox International company headquartered in Columbia, South Carolina. Allied Air also builds Armstrong Air, AirEase, Ducane, Allied Commercial and MagicPak, and Concord says its products are made in a South Carolina facility. Concord's furnace, air conditioner and heat pump model numbers match Ducane's, so those two are the closest pair in the family.
Is Concord the same as Ducane?
Mechanically, nearly. The model numbers match across the current lineup, from the 97G2VK furnace to the 7SHP15V heat pump, and Allied Air introduced its 97% two-stage furnaces in 2024 under both names at once. The registration rules match too. The difference is the badge and who sells it, so a Ducane manual for your model number applies to your Concord.
What does the model number on my Concord furnace mean?
The first two digits are the AFUE rating, 80 through 97. The digit after the G is the number of heat stages, 1 or 2. The letter after that is the blower: E for a constant-torque motor, V for variable-speed. So a 92G1EK is a 92% single-stage furnace with a constant-torque blower, and a 97G2VK is a 97% two-stage furnace with a variable-speed blower.
How long do I have to register a Concord?
Concord's terms say equipment must be registered within 60 days of installation, or within 60 days of closing if it came with a new home. Unregistered equipment gets a 5-year limited parts warranty and a 20-year limited heat exchanger warranty. Registered, Concord lists its furnaces with a 10-year limited parts warranty and a limited lifetime heat exchanger warranty.
Sources
- Concord official site concord-air.com