MSP’s published AC installation prices start at $7,000, with $9,000 as the average and $12,000+ at the high end. These are our Twin Cities planning prices as of October 2026. System size, efficiency and installation work affect your final quote.
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
| MSP AC installation | Published price |
|---|---|
| Starting price | $7,000 |
| Average | $9,000 |
| High end | $12,000+ |
Compare the full scope when you read a quote. It should identify the outdoor unit, matched indoor coil and any changes to controls, wiring or ductwork. A furnace replacement is a separate item to confirm.
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.
| Cooling capacity | Output | How to choose |
|---|---|---|
| 2 ton | 24,000 BTU per hour | Match the home’s cooling load |
| 3 ton | 36,000 BTU per hour | Check load, airflow and duct capacity |
| 4 ton | 48,000 BTU per hour | Check load, airflow and duct capacity |
| 5 ton | 60,000 BTU per hour | Use only when the calculated load calls for it |
Square footage is only one part of a cooling-load calculation. Windows, insulation and sun exposure matter too. Use the calculated load and duct capacity to choose the system, then compare installed quotes.
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 installation. Leaky or undersized ducts can limit comfort and efficiency. Ask whether repairs or new ducts are part of the quoted work. A replacement on sound ductwork has a different scope from a whole new distribution system.
Permits and removal. Confirm that the quote covers required permits, inspection and removal of the old equipment. Those details help you compare prices fairly.
Repair or replace? The $5,000 rule
The $5,000 rule is a rough repair-or-replace screen. It multiplies system age by repair cost. Use it to start a discussion, then look at the actual repair and replacement options.
For example, 10 years times a $600 repair equals $6,000. That does not automatically make replacement the better deal. Compare the repair’s likely benefit with the installed price, remaining warranty and history of breakdowns.
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.
Check your utility’s current AC rebates before you buy. Minnesota’s energy program information can help you find state options. Confirm the equipment and installation requirements before including an incentive in your budget.
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?
MSP’s posted AC installation prices start at $7,000, average $9,000 and reach $12,000+. Our AC installation page lists the pricing and service details. Additional duct or furnace work changes the scope.
What is the $5,000 rule for HVAC?
Multiply system age by repair cost. A result above $5,000 is a prompt to compare replacement, not an automatic verdict. Condition, warranty coverage and the actual new-system price also matter.
How much is a new air conditioner for a 2,000 square foot house?
A 2,000-square-foot home needs a cooling-load calculation before sizing. Window area, insulation and sun exposure can change the capacity required. Start with MSP’s published $7,000 to $12,000+ installation range, then get a quote based on the home.
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.
For more on heating and cooling costs, see our guides to comparing SEER2 ratings and the AC refrigerant changes.