How to Size Central AC for a Twin Cities Home
Why square-foot rules oversize Minnesota air conditioners, what Manual J load calculation measures and how to read your current unit. Installs $5,200–$9,800.
Read the guide
AC Replacement in Stillwater, MN
Central AC replacement in Stillwater runs $5,200–$9,800 installed with us, quoted flat-rate in writing after a Manual J. West-side two-stories usually get a new condenser and matched coil, while plaster-walled houses on the hills without ducts suit small-duct high-velocity or ductless equipment.
AC replacements in Stillwater homes
What a new AC involves in Stillwater depends on which part of town you live in. In the west-side two-stories, the original builder condenser and coil come out together, a coil built for the new condenser's R-454B or R-32 refrigerant goes on the furnace, and the line set is checked for size and condition before we decide whether it stays.
On the hills, placement is the first question. A condenser on a designated historic property may need Heritage Preservation Commission review, and the least visible spot on a steep lot can mean a longer line-set run. Houses without ducts get small-duct high-velocity systems or ductless heat pumps rather than full-size ducts cut through plaster. A cold-climate heat pump is worth pricing in either kind of house. Xcel Energy supplies the electricity, and its heat pump rebates are tied to its Trade Partner Network of contractors, so confirm that requirement before you buy.
Updated November 10, 2026
What affects the price of a new central AC in Stillwater?
What moves an AC quote within that range: tonnage from the Manual J load calculation, the SEER2 rating, a new coil and line set, and any electrical work. See the AC replacement cost guide or furnace and AC together.
Are there rebates for a new air conditioner in Stillwater?
Mini-split and cold-climate mini-split heat pumps, a common way to cool radiator homes, have their own Xcel rebates. Ask us which rebates apply when we quote. Rebate programs change every year, so check the utility's current terms before you buy.
Our guides: Xcel and CenterPoint rebates, heat pump rebates.
AC replacement in Stillwater: questions
Does a small-duct high-velocity system cost more than regular central air in Stillwater?
Usually, because the flexible tubing has to be fished through finished walls, closets and floors. National cost guides such as HomeGuide put a typical high-velocity small-duct system at $3,500–$15,000+ installed, depending on house size and how difficult the retrofit is. In a plaster-walled house on the hills it often beats cutting in full-size ducts, and we price it in writing after seeing the attic and closets.
Should we replace the original AC and furnace together in a west-side Stillwater two-story?
Often, if both came with the house. The coil sits on the furnace, so doing both lets us match blower, coil and condenser, size them together with one Manual J and set up one thermostat for the pair. If the furnace was already replaced and is healthy, we swap only the AC and adjust the blower for the new coil. We'll quote both ways so you can compare.
More in Stillwater
- Furnace repair in Stillwater
- Furnace replacement in Stillwater
- AC repair in Stillwater
- Heat pumps in Stillwater
- Mini-splits in Stillwater
- Boiler service in Stillwater
- Tune-ups in Stillwater
- All HVAC service in Stillwater
AC replacement near Stillwater
- Oak Park Heights, MN AC replacement · 2 mi
- Bayport, MN AC replacement · 3 mi
- Grant, MN AC replacement · 5 mi
- Hudson, WI AC replacement · 6 mi
- Lake Elmo, MN AC replacement · 6 mi
- Mahtomedi, MN AC replacement · 7 mi
Brands we install and service
Guides on AC replacement
How Long Does a Central Air Conditioner Last in Minnesota?
Carrier and Lennox put central AC life at 15–20 years. See what Minnesota summers, cottonwood and salt do, and when a $5,200–$9,800 replacement beats repair.
Read the guideHigh-Efficiency AC Payback in Minnesota: SEER2 vs Savings
A higher-SEER2 air conditioner rarely pays back on savings alone in Minnesota. Run the math with your own bills; our installed AC range is $5,200–$9,800.
Read the guideContact Us
Heat out? AC quit? Call or send a request.