Ductless mini-splits for additions, attics, and retrofits.
A finished attic that gets too hot. A garage shop you want to use in winter. A new addition with no duct extension. Ductless mini-splits solve the rooms a central system was never going to reach.
What we cover.
Ductless mini-splits are our favorite tool for the tricky room. They deliver heating and cooling without ductwork, run quiet, and pair cleanly with smart thermostats. Modern cold-climate variants work in Duluth winters down to design conditions.
We install single-zone and multi-zone mini-split systems across the Twin Ports. Finished attics, additions, sunrooms, four-season porches, detached garages, accessory dwelling units, and tricky retrofits where running ductwork would be ugly or impossible.
Signs you need mini-split service.
If one of these is happening at your house, do not wait. The longer you run it, the more it costs to fix.
Finished attic that gets too hot
Central system was never going to reach a converted attic. A single-zone mini-split solves it for a fraction of duct extension.
Garage or shop you want to use year-round
Detached or attached. Mini-splits run quiet and heat down to design conditions. Perfect for a workshop or studio.
New addition with no duct extension
Sunrooms, four-season porches, in-laws suites. Adding a head is faster, cleaner, and cheaper than running ducts.
One room is always uncomfortable
Hot upstairs, cold basement, an office in the back of the house. Often a one-room mini-split fix beats balancing the whole system.
You hate window AC units
Mini-splits are quieter, way more efficient, and look better. They also heat in shoulder seasons.
You want zone control without a remodel
Multi-zone mini-splits let you cool the rooms you use and ignore the ones you do not. Real savings without ductwork.
Four steps from your call to a comfortable home.
Walk-through
We see the room, talk through the use case, and identify the cleanest place to run the line set.
Honest sizing
Right-sized to the room. Oversized mini-splits short-cycle and cost more, undersized ones run constantly. We size to the actual load.
Clean install
Indoor head leveled, line set hidden or covered, condensate pumped or drained properly, no exposed copper running down the siding.
Commissioning
Refrigerant charge by weight, controls programmed, remote demo, and a one-year labor warranty in writing.
Real numbers, before you call.
We are not afraid to publish prices. Final quotes are flat-rate, written, and itemized after we see your system.
Single-zone install
- Cold-climate model rated for Duluth winter
- Line set hidden or covered, condensate routed properly
- Permit, commissioning, 1-year labor warranty
Multi-zone install
- Designed and balanced for the way you actually use the rooms
- Smart thermostat or per-zone wall controls
- Federal 25C credit applies to qualifying cold-climate units
Single-zone repair
- Indoor head fan motor, control board, drain pan
- Outdoor unit fan motor, capacitor, contactor
- Refrigerant leak search and recharge
Garage or shop installs with no insulation may need additional electrical work. We confirm at the site visit before quoting.
Why homeowners pick Northland Air for mini-split.
Concealed line sets
We hide line sets in soffits, walls, and chases wherever practical. When we cannot, we use clean line-set covers. No exposed copper running across the front of the house.
Multi-zone expertise
Single outdoor unit driving 2-5 indoor heads is a great way to add comfort without adding equipment outside. We design and balance multi-zone systems for the real way you use the rooms.
Quiet operation
Modern inverter mini-splits run as quiet as a library. We commission them right so they stay quiet, no rattle, no resonance, no late-night fan hunting.
What homeowners say about our mini-split work.
The crew that put our mini-split in our finished attic was professional, polite, and left it cleaner than they found it. They also took the time to show me how the remote worked. That kind of small thing is why we tell our neighbors.
Brands we service and install: Mitsubishi · Daikin · Fujitsu · LG · Bosch · Gree
Single head, multi-zone, or one per room.
Mini-splits work best when sized to the way you actually live in the space. Bigger is not better. Here is how we think about it.
| Use case | Recommended config | Approx capacity | Install range |
|---|---|---|---|
| Single room (bedroom, attic, addition) | Single-zone | 9k to 12k BTU | $4,000 to $5,500 |
| Detached garage or shop | Single-zone | 12k to 18k BTU | $4,500 to $6,500 |
| Upstairs of a 2-story home | Multi-zone, 2 heads | 18k to 24k BTU | $7,500 to $9,500 |
| Whole-floor or ADU | Multi-zone, 3 to 4 heads | 24k to 36k BTU | $10,500 to $14,500 |
| Primary heat for a small, tight home | Multi-zone, 3+ heads, cold-climate | 36k+ BTU | $12,500+ |
We confirm BTU sizing with a Manual J load calc, not a square-footage rule. Insulation level and window orientation move the number significantly.
Mini-Split questions, answered.
Single-zone systems typically run $4,000 to $6,500 installed in the Twin Ports. Multi-zone systems with 2-4 indoor heads run $7,500 to $14,500. Federal 25C credit applies to qualifying cold-climate units.
Cold-climate models will. Standard mini-splits start losing capacity below 20 degrees. We spec cold-climate variants that deliver rated heat down to minus 5 and usable heat below that.
Indoor heads run 20-30 dB at low fan, quieter than a refrigerator. Outdoor units run 50-58 dB at full output, similar to a quiet conversation. Far quieter than a window AC.
Most single-zone mini-splits install in one day. Multi-zone systems with 3-4 heads take two days. We confirm timeline at the quote.
Yes. We pull every permit our work requires, included in the quoted price. The permit also documents the refrigerant work for resale.
Sometimes. For well-insulated homes with a heat-loss small enough to handle, multi-zone cold-climate mini-splits can be the primary heat. For most existing Twin Ports homes, mini-splits supplement rather than replace the central system.
Available across the Twin Ports.
Same-day mini-split service in your neighborhood.