Duluth, Minnesota · St. Louis County

Furnace Installation & Replacement in Duluth, MN

My furnace is done and I need to know what to replace it with and what it costs. We are based in Duluth.

Call (218) 461-1049 Request service online

$89 diagnostic, credited toward the repair when you approve the work. Answered 24/7 in Duluth and everywhere inside 45 miles.

Short answer

How much does a new furnace cost in Duluth, MN?

A replacement furnace in the Twin Ports typically runs $4,500–$9,500 installed, depending on capacity, efficiency and what the venting and ductwork need. We size every furnace with a Manual J load calculation rather than matching the old nameplate, because most furnaces in this region were installed oversized. In Duluth specifically: we are based here, and duluth is on natural gas, which keeps operating costs down and means a high-efficiency condensing unit is usually the right specification here.

What is different about furnace installation in Duluth

Duluth is on natural gas, which keeps operating costs down and means a high-efficiency condensing unit is usually the right specification here.

Being on the Lake Superior shoreline moderates the winter lows compared with inland towns, but the trade is constant wind and moisture that corrodes outdoor equipment years faster than inland units.

Duluth's housing stock is genuinely old. A large share of the homes east of Mesaba Avenue predate 1940, which means balloon framing, plaster and lath, original chimneys, and basements that have been settling into bedrock for a century. West of downtown the stock runs to modest early-1900s frame houses and post-war builds, with Morgan Park's distinctive concrete company housing its own category entirely.

Duluth in practice

Duluth is the most varied service area we have, and it is really three heating markets in one city. The east-end and hillside housing is heavily hydronic — cast-iron radiators fed by a basement boiler, and a lot of our winter work is boiler work in these neighborhoods rather than furnace work. The hillside grade itself matters: the temperature difference between Park Point and the top of the hill on the same January morning can be substantial, and a system sized for one is wrong for the other. Above the hill in Duluth Heights and Piedmont you get the snowbelt and the wind; down on Park Point you get moisture and wind off the lake from two sides, which is hard on outdoor equipment. We stock out of here, so Duluth calls almost always get same-day attention.

What we actually see in Duluth

The east end and both hillsides are boiler-and-radiator country. If a company tells you replacing your boiler means converting to forced air, get a second opinion — ducting a 1915 hillside house is expensive and unnecessary.
Park Point and the lakefront take wind and moisture from two directions, which corrodes outdoor condensers and heat pump coils years faster than inland units. Coil condition is worth checking annually down there.
High-efficiency furnaces in hillside houses frequently ice their sidewall vent terminations during freezing drizzle off the lake. If your furnace locks out when the weather turns, that is usually why, and relocating the termination stops it.
Orphaned water heaters are everywhere here. Decades of furnace upgrades left natural-draft water heaters venting alone up chimneys sized for two appliances, and those flues do not draft. It is a carbon monoxide risk worth having checked.
The steep driveways and tight alley access east of downtown are normal for us — we plan equipment delivery around them rather than discovering the problem on install day.

What furnace installation costs in Duluth

$4,500–$9,500

A straightforward 80% AFUE swap in an accessible basement is at the low end. A 96%+ condensing furnace needing new PVC venting, a new condensate path, a liner for the orphaned water heater, and duct modifications sits at the high end. Rebates from Comfort Systems, Minnesota Energy Resources or Focus on Energy come off the top, and the federal 25C credit may apply.

Ranges are typical installed costs in the Twin Ports area, not quotes. We give you a firm price in writing before any work starts.

Signs you need furnace installation

The furnace is 18+ years old and has started needing a repair every season
A technician has found or suspected a cracked heat exchanger
Repair quote is more than about a third of the cost of replacing it
Gas bills climbing year over year with no change in how you live
Rooms that have never heated evenly since the day you moved in
The furnace is so loud you can hear it start from anywhere in the house
You are already replacing the water heater or adding air conditioning — combining the work saves labour

Furnace Installation & Replacement in Duluth — questions

Do you do furnace installation in Duluth, MN?

Yes. Duluth is our home city and we are here every day. Same-day is the normal outcome for repair calls here.

What does furnace installation cost in Duluth?

Typically $4,500–$9,500, the same as anywhere else in our 45-mile area — we do not price by distance. A straightforward 80% AFUE swap in an accessible basement is at the low end.

Is there a travel charge to Duluth?

No. The $89 diagnostic is identical across the whole 45-mile area. Distance changes the response window, not the price.

How much does a new furnace cost in Duluth or Superior?

Typically $4,500–$9,500 installed. The spread is driven by capacity, efficiency tier, and what the venting, condensate and ductwork need — not by brand markup. We quote fixed prices with the rebate amounts already identified, and we will show you two or three real options rather than one number.

How long does installation take?

A straightforward replacement is one day. Add a day if we are converting venting from a chimney to sidewall PVC, lining a chimney for an orphaned water heater, or doing meaningful duct work. You will not be without heat overnight — if a job has to run two days we bring temporary heat.

More on Furnace Installation & Replacement

This page covers what is specific to Duluth. For the full technical detail — how the work is done, what fails and why, and the complete cost breakdown — see our main furnace installation & replacement page.

Furnace Installation & Replacement in full →

Other work we do in Duluth

Furnace Installation & Replacement in nearby towns

We cover the whole 45-mile area from the same trucks, so Duluth and the towns around it are the same day's work.

All service areas →

Duluth at a glance

County: St. Louis County, Minnesota
ZIP codes: 55801, 55802, 55803, 55804, 55805, 55806, 55807, 55808, 55811, 55812
Distance: Our home base — we stock out of here
Typical response: Home city — we are here every day
Heating fuel: Natural gas in town
Climate: Lake Superior shoreline — moderated lows, heavy wind and moisture
Rebate program: Minnesota Power / Minnesota Energy Resources / Comfort Systems

Nearby communities we also serve

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Rebates and tax credits you may qualify for

This service area spans several different utility programs, and which one applies depends on your address and fuel. We identify the ones you qualify for, install to the tier that actually earns them, and file the paperwork.

Minnesota Power — Power of One® Home rebates MN electric customers air-source and ground-source heat pumps, smart thermostats, ECM fan motors
Minnesota Energy Resources rebates MN natural gas customers outside Duluth 95%+ AFUE furnaces, condensing boilers, smart thermostats
Federal 25C Energy Efficient Home Improvement Credit MN and WI tax credit on qualifying heat pumps, furnaces and boilers

Program amounts and qualifying equipment tiers change, so we verify current values at quote time rather than publishing numbers that go stale. More on rebates and credits.

Need furnace installation in Duluth?

Home city — we are here every day. We answer 24 hours a day, every day of the year. $89 diagnostic, credited toward the repair when you approve the work.

Call (218) 461-1049 Request service