Most Minnesota homeowners pay $3,900 to $8,100 to replace a central air conditioner, installed. A full system replacement, where the coil and sometimes the furnace go in too, runs higher, often $7,000 to $12,500. The national average lands near $6,000.
Why the wide range? A few things drive it. The size of the unit, the SEER2 efficiency you pick, whether your ductwork needs work, and the install itself. Here is what each one costs in 2026, and where your home is likely to land.
2026 AC replacement prices at a glance
| The job | Installed cost (2026) |
|---|---|
| Replace the AC unit only (reuse your coil and furnace) | $3,900 to $8,100 |
| Full system replacement (AC plus coil, sometimes furnace) | $7,000 to $12,500 |
| Step up to high-efficiency SEER2 | adds $1,500 to $4,000 |
Labor alone runs $500 to $2,500 of that total. The rest is the equipment and any extra work your home needs.
Cost by AC size
Air conditioners are sized in tons. Bigger is not better. An oversized unit short cycles, wastes energy, and wears out early. A pro sizes it with a load calculation, but here is a rough guide.
| Unit size | Cools roughly | Equipment plus install |
|---|---|---|
| 2 ton (24,000 BTU) | 1,000 to 1,200 sq ft | $1,500 to $5,000 |
| 3 ton (36,000 BTU) | 1,500 to 1,800 sq ft | $2,000 to $5,500 |
| 4 ton (48,000 BTU) | 2,000 to 2,400 sq ft | $2,600 to $6,200 |
| 5 ton (60,000 BTU) | 2,400 to 3,000 sq ft | $2,800 to $6,800 |
The total climbs from there with a higher SEER2 rating or any duct and electrical work.
What changes the price
Unit size. A larger home needs more tons of cooling, and more tons cost more. Get the size right the first time. An AC that is too big for the house is a common and expensive mistake.
SEER2 efficiency. SEER2 measures how much cooling you get per dollar of electricity. The federal minimum for northern states like Minnesota is 13.4 SEER2, which is about a SEER 14. High-efficiency units run 15.2 SEER2 and up. They cost more up front and cut your summer electric bills in return.
The refrigerant change. New air conditioners now use a low-emission refrigerant that replaced the old R-410A in 2025. This pushed 2026 equipment prices up across every brand. It is worth knowing before you compare an old quote to a new one.
Ductwork and install. Leaky or undersized ducts cost more to work around. Adding or replacing ductwork can run $3,000 to $7,500. A clean swap on good ducts sits at the low end of every range above.
Permits and removal. A permit and inspection protect your home and usually come baked into the quote. Hauling away the old unit adds little, from $25 to $200.
Repair or replace? The $5,000 rule
Not sure whether to fix your AC or replace it? HVAC pros use a simple test called the $5,000 rule.
Multiply the age of the unit by the cost of the repair. If the number tops $5,000, replace it. A 10 year old AC with a $600 repair comes to $6,000, so replacement wins.
A few other signs point to replacement. Age is the big one. Most central ACs last 15 to 20 years, so a 7 year old unit is only middle aged and usually worth repairing. Rising electric bills, weak cooling, or a system that uses the old R-410A refrigerant all tilt the math toward a new unit.
High-efficiency units pay you back
A high-efficiency SEER2 unit costs more the day it goes in. Then it trims your electric bill every summer for the next 15 years or more.
There is help with the up-front cost. Xcel Energy offers rebates on qualifying high-efficiency central air conditioners in Minnesota. The amounts change each year, so ask us for the current rebate before you buy. We handle the paperwork on the install.
The contractor is the biggest variable
Two quotes on the same AC can differ by thousands. The gap is usually the sizing, the ductwork, and whether the job is permitted and done right.
MSP Plumbing Heating Air has cooled Minneapolis and St. Paul homes since 1918. We size the unit with a load calculation, pull the permit, and give you a firm price before we start, backed by our satisfaction guarantee. Financing is available, so a July breakdown does not have to wait.
Call MSP at (651) 228-9200 for a free AC replacement quote, or book online.
Frequently Asked Questions
How much should a full AC replacement cost?
Most Minnesota homeowners pay $3,900 to $8,100 to replace the AC unit. A full system with a new coil, and sometimes a furnace, runs $7,000 to $12,500.
What is the $5,000 rule for HVAC?
Multiply the age of the unit by the repair cost. If the total is over $5,000, replace the system instead of fixing it. If it is under, a repair usually makes sense.
How much is a new air conditioner for a 2,000 square foot house?
A 2,000 square foot home usually needs a 3.5 to 4 ton unit. Plan on roughly $2,600 to $6,200 for the equipment and install, more with high-efficiency SEER2 or duct work.
How long does a central AC last?
About 15 to 20 years in Minnesota, since the unit only runs a few months a year. A 7 year old AC is middle aged, not old.