Quick answerDuctless mini-split installation in Spokane puts a wall, ceiling or floor head in each room and connects it to one outdoor heat pump through a small hole for the line set. A single-zone install usually takes a day; multi-zone systems take two to three. Cold-climate models keep heating on Spokane's coldest nights.
Updated September 2026
Heat and cooling without ductwork
Many Spokane homes were built with electric baseboard, a gravity furnace that was never ducted for cooling, or additions and garages the main system never reached. Adding ducts to finished walls is disruptive and expensive. A ductless system needs only a three-inch opening per head, a line set, a condensate drain and a dedicated circuit.
Each head runs on its own thermostat, so the bedrooms can sleep cool while the living room stays warm. We size every zone from the room's heat loss, not a rule of thumb, and choose cold-climate outdoor units that keep heating when the temperature drops below zero.
What sets the price of a ductless install
Planning range: One 2026 cost guide puts a simple single-zone install at around $3,000 to $5,000 where access is easy, and $12,000 to $25,000 when a home needs a heat pump plus new ducts. These are published market figures from 2026-07, given for planning, with the on-site estimate as the real price.
Ductless projects we install
Single-zone ductless systems
A single-zone system pairs one outdoor unit with one indoor head, and it is the simplest install we do. It suits a hot upstairs bedroom, a sunroom, a home office over the garage or a finished basement that never warms up. We place the head where it can throw air across the room without blowing directly on a bed or desk, run the line set through the wall behind it, and set the outdoor unit on a stand or wall bracket above snow level. Most single-zone jobs are done in a day.
Multi-zone ductless systems
A multi-zone system runs two to five indoor heads from one outdoor unit, which keeps the outside of the house tidy and costs less than several separate systems. The catch is sizing: each head has to match its room, and the outdoor unit has to match the total without being oversized. We lay out the line-set routes so they run through closets, attics or a single covered chase rather than zigzagging across the siding, and label every zone at the outdoor unit.
Baseboard-to-ductless conversions
Replacing electric baseboard with a ductless heat pump is one of the biggest efficiency upgrades a Spokane home can make, because a heat pump moves heat rather than making it from resistance. We usually leave some baseboard in place as backup in rooms without a head, and remove the rest. The breakers freed up from the baseboard circuits often cover the new outdoor unit, which keeps the electrical work simple. We also check whether the job fits a current utility conversion rebate.
Additions and garages
Additions, converted garages and detached shops are classic ductless jobs because extending the main system to them rarely works well. A single head sized to the space heats and cools it independently, and the owner can simply shut it off when the room sits empty. In garages we choose a model that can hold a low setpoint through winter to protect tools, paint and water lines, and we mount the head high enough to stay clear of vehicles and ladders.
Ductless head styles compared
| Wall head | Ceiling cassette | Floor console | |
|---|---|---|---|
| Where it goes | High on a wall | Recessed in the ceiling | Low on a wall |
| Looks | Visible | Mostly hidden | Visible, compact |
| Best for | Most rooms | Open rooms with attic space above | Sunrooms, under windows, heat at floor level |
| Relative cost | Lowest | Highest | Middle |
Older Spokane homes and baseboard heat
In West Central the median home was built in 1938 and just over half predate 1940, and many older Spokane houses either never had ducts or run baseboard heat in upstairs rooms. Those are the homes where ductless makes the most sense. Avista has paid a rebate for converting electric baseboard to a qualifying ductless heat pump, so we confirm the equipment rating meets the current program before you order.
How a ductless installation runs
- 1
Room-by-room sizing
Heat loss calculated for every zone.
- 2
Plan the layout
Head locations, line-set routes and outdoor placement agreed.
- 3
Quote and permit
Written price, then the mechanical permit filed.
- 4
Mount the heads
Brackets leveled, wall openings cut and sealed.
- 5
Set the outdoor unit
Stand or bracket above snow, clear of roof runoff.
- 6
Connect and charge
Flares torqued, nitrogen tested, deep vacuum, charge verified.
- 7
Commission each zone
Heating and cooling tested head by head, remotes set up.
Ductless installation questions
Will a mini-split heat my room in January?
A cold-climate model will. We install units rated to keep heating well below zero and leave baseboard backup where it makes sense.
How many heads do I need?
One per room or open area you want to control. Open floor plans can share a head; closed bedrooms usually need their own.
Is the outdoor unit loud?
Modern inverter units are quiet, often quieter than a conversation. We place it away from bedroom windows where possible.
Can I get a rebate?
Avista has offered rebates for converting baseboard heat to qualifying ductless heat pumps. Check the current program before buying.
How long does a ductless install take?
A single zone takes about a day; a three or four-zone system takes two to three days.
Other heat pumps & ductless services we handle
Heat Pump Repair
Answered 24/7, parts on the truck.
Heat Pump Repair detailsHeat Pump Maintenance
Seasonal service, fewer breakdowns.
Heat Pump Maintenance in SpokaneDuctless Mini-Split Cleaning
Seasonal service, fewer breakdowns.
How we handle ductless mini-split cleaningComfort for the rooms your system never reached.
Call about ductless installation in Spokane, WA.
