Central AC Replacement & Installation Across the Twin Cities

How much does a new central AC cost?

The low end of that range is a modest-size single-stage system that reuses a sound line set and pad. The high end is a larger or variable-speed system with a new line set, a new pad and electrical work. Your written quote lists what's included, and the price doesn't change once you approve it.

• Warranty: 2 years on our labor, on top of the manufacturer's parts warranty. Many manufacturers require online registration within a set window for their longer parts coverage, so check the terms for your equipment.
• Payment: cash, check or credit card, and financing is available on installs.

Our pricing page has every published price, the Minneapolis HVAC cost guide shows how they apply to city houses, and AC replacement cost in Minnesota goes through a quote line by line. If you're still deciding whether to repair the old system, our cooling overview lays out how we make that call.

What size central AC does your house need?

The tonnage on your old condenser tells us what somebody installed, not what the house needs. (A ton of cooling is 12,000 BTU per hour.) Since that unit went in, you may have added attic insulation, replaced windows, finished the basement or taken out a wall. So we run a Manual J load calculation: room-by-room square footage, window area and which way the glass faces, insulation levels and how leaky the house is. The resulting cooling load is what we match the equipment to.

Oversizing is the common mistake here. Our summers are humid, but they aren't long. A unit that's too big cools the house in short blasts, shuts off before the coil has pulled much water out of the air, and leaves the rooms cold and damp. A right-sized system runs longer, quieter cycles and keeps the house drier. Our sizing guide walks through the calculation.

We look at the ductwork and the furnace too. Plenty of older houses have undersized returns, and a new system can only move as much air as the ducts and the furnace blower allow. Whistling registers and a warm upstairs are the usual signs, and we'd rather point that out before the install than after.

Which SEER2 rating and compressor staging should you choose?

Since January 1, 2023, efficiency has been rated in SEER2, a newer DOE test procedure whose numbers read lower than the old SEER for the same equipment, so don't compare a SEER2 quote against an old SEER sticker. Minnesota is in DOE's North region, where the federal minimum for a new split central AC is 13.4 SEER2. Above the minimum, the choice that changes how the house feels is the compressor.

Two-stage and variable-speed outdoor units need a furnace blower and thermostat that can run them, which we check before quoting. With our short cooling season, a very high SEER2 rating takes longer to earn back on the electric bill than it would in a hotter state. What you notice day to day in a Minnesota July is staging: a house that feels drier at the same setting. Two-stage vs variable speed goes deeper.

Do you need a new indoor coil and line set?

Under the EPA's Technology Transitions rule, residential air conditioners manufactured from 2025 on use lower-GWP refrigerants such as R-454B or R-32. R-410A is not banned. Since EPA dropped its January 1, 2026 install deadline on May 21, 2026, R-410A units built or imported before 2025 can still go in, and existing R-410A systems can still be recharged. Whichever refrigerant your quote uses:

• The indoor coil is replaced with the outdoor unit. The coil on your furnace and the condenser outside are rated as a matched pair, and a new R-454B condenser needs a coil built for R-454B. You can look up a rated match in the AHRI directory.
• R-454B and R-32 are mildly flammable (A2L). They come with their own installation rules, and many new indoor coils include a refrigerant leak sensor.
• The line set gets a hard look. The copper between the units may be reusable if it's the right size, in good shape and properly cleaned. Lines that are kinked, undersized or buried in a finished ceiling with an unknown history may be worth replacing, and the quote says which way we're going.

Coming off an R-22 system, everything changes at once: new condenser, new coil and a close look at the line set.

How does a central AC install work?

1. Home visit. We measure for the Manual J and look at the furnace, ducts, electrical panel and where the condenser can go.
2. Written quote. One flat-rate price listing the equipment, coil, line set, pad and electrical work. We can price two or three efficiency levels side by side.
3. Permit. Replacing a central AC normally needs a mechanical permit from the city, or from the county or state where the city has no building department. Our HVAC permit guide explains the permit and the inspection.
4. Removal. EPA 608 certified technicians recover the refrigerant from the old system, and the old condenser and coil come out.
5. New equipment. The coil is set on the furnace and sealed to the plenum with a trap and drain. Line-set joints are brazed with nitrogen flowing through the copper, which keeps scale from forming inside. The condenser goes on a level pad with room for airflow and service.
6. Vacuum, charge and test. The system is pulled into a deep vacuum and held to prove it's tight, then charged and checked by superheat or subcooling.
7. Walkthrough. We set up the thermostat and show you the filter, the drain and the outdoor unit. The city inspector checks the work afterward.

Installing central air in Minnesota houses

In Minneapolis and Saint Paul, many older houses got central air on ductwork converted from gravity heat. The coil has to fit on the furnace in a low basement, the returns often need work, and a story-and-a-half's upstairs won't cool well without its own ducts or a ductless head. Houses heated by boilers and radiators have no ducts at all; for those we quote ductless mini-splits. On a narrow city lot, finding a condenser spot that meets the manufacturer's clearances takes planning. AC installation in Minneapolis and in Saint Paul cover the local detail.

In the suburbs, 1970s–90s split-levels and ramblers often have return ducts sized for heating, and newer two-story houses fight a hot upper floor, where staging or zoning helps. Wherever the house is, we keep the condenser away from the roof edge where snow and ice slide off, out of the drip line and away from the dryer vent.

Your electric utility decides which cooling rebates apply: Xcel Energy across much of the metro, or a co-op such as Dakota Electric, Connexus Energy or Wright-Hennepin, or a city utility, in many other towns. Programs change every year, and some, such as Dakota Electric's quality-installation rebates, need a utility-registered contractor, so check the current page and ask whether the rebate needs a registered contractor before you buy. In the Wisconsin towns we serve, Focus on Energy is the statewide efficiency program. The federal 25C tax credit, which used to cover qualifying central air, ended for equipment placed in service after December 31, 2025.

Should you replace the furnace or add a heat pump at the same time?

The AC coil sits on your furnace, and the furnace blower moves every bit of the cooled air. If the furnace is young, replace the AC alone and we'll set the blower for the new coil. If the furnace is near the end too, doing both at once lets us match blower, coil and condenser as one system. Furnace installation covers that side.

Replacement is also the moment to price a heat pump instead of a straight AC. A heat pump cools the same way, then heats the house in spring and fall, with the furnace taking over through a cold snap. It costs more up front, $7,500–$14,500 installed, and usually pays off most in homes heated with propane or electric resistance.

We service every major brand and install the one that fits your house and budget, whether that's Carrier, Trane, Lennox or Goodman. Our central AC brands guide compares them for Minnesota.

What's included with AC replacement & installation?

• Manual J load calculation to size the system
• Indoor coil matched to the new outdoor unit and its refrigerant
• Line set checked for size and condition, or replaced
• Level pad, disconnect and electrical hookup
• Written quote that notes whether your city requires a mechanical permit
• Old refrigerant recovered by EPA 608 certified technicians
• Deep vacuum, then the charge checked by superheat or subcooling

AC replacement & installation questions

Sources

• AHRI Directory of Certified Product Performance ahridirectory.org
• U.S. Environmental Protection Agency epa.gov
• U.S. Department of Energy energy.gov
• Focus on Energy home energy rebates focusonenergy.com