Ductless Mini-Split Installation in Ottawa
Quiet, efficient heating and cooling for rooms and homes without ductwork
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- 24/7 emergency service
- Family-owned since 2005
Quiet, efficient heating and cooling for rooms and homes without ductwork
- Free estimates on new installations
- Financing from $49/month (OAC)
- All makes and models serviced
How a ductless mini-split works
A ductless mini-split has two parts: a compact outdoor unit and one or more indoor heads, usually mounted high on a wall. They are joined by a small bundle of refrigerant lines, a drain and a control cable that passes through a hole about 7–8 cm across. No ducts, no furnace and no major renovation.
Nearly every mini-split sold today is a heat pump. It cools and dehumidifies in summer, then reverses to heat in winter. Inverter compressors speed up and slow down to match the room, so the temperature stays steady instead of swinging up and down.
Oria installs ductless mini-split systems across Ottawa, and we hold the licences required to work in Gatineau, Quebec, where many homes heat with Hydro-Québec electricity and baseboards. Every install is handled by licensed refrigeration technicians, from the outdoor bracket to the final vacuum test.
Where a ductless mini-split makes sense in Ottawa
Ductless systems solve problems that central air cannot. These are the situations where we recommend them most often.
Additions and sunrooms
Extending existing ducts to a new room rarely works well. A single wall unit gives the addition its own heating and cooling.
Finished basements
Basements in Ottawa run cool and damp. A mini-split adds gentle heat in winter and dehumidifies in summer without tearing into the ceiling.
Rooms over the garage
Bonus rooms over garages are often the hottest and coldest rooms in the house. A dedicated head fixes the room without upsetting the rest of the system.
Baseboard-heated homes
Common in older Ottawa homes and across Gatineau. A mini-split adds air conditioning and heats far more efficiently than baseboards.
Boiler and radiator homes
Hot water heating is comfortable but offers no cooling. Ductless heads add AC without running ducts through plaster walls.
Learn more →Condos and townhomes
Where there is no room for ducts, a compact system can work, subject to your condo board's rules on wall penetrations and outdoor units.
Single-zone vs multi-zone: costs and trade-offs
A single-zone system pairs one outdoor unit with one indoor head. A multi-zone system runs two to four heads from one larger outdoor unit, each with its own temperature control.
| Setup | Typical installed cost | Best for |
|---|---|---|
| Single zone (1 outdoor, 1 indoor head) | $3,500–$6,500 | One room, an addition, a basement or a condo |
| Multi-zone (1 outdoor, 2–4 indoor heads) | $7,000–$16,000 | Whole floors or homes without ducts |
| Ducted cold-climate heat pump (for comparison) | $9,000–$18,000 | Homes with existing ductwork |
Final price depends on your home, the equipment you choose and the ductwork, venting and electrical work involved. Oria gives free estimates on all new installations. The biggest factors are the number of heads, the style of each head, how far the refrigerant lines run and how much heating capacity you need at −25 °C.
Which is better?
- Multi-zone means one outdoor unit and fewer holes in the wall, which helps on tight lots and in condos. If it fails, though, every room served loses heating and cooling.
- Two or more single-zone systems usually cost a little more, but each one is often more efficient at low loads and you keep redundancy if one unit needs repair.
See our detailed ductless mini-split cost guide for Ottawa for more examples. Rebates may be available for qualifying cold-climate systems; Oria will check current programs for your home. See HVAC rebates.
Efficiency and cold-weather performance
Single-zone mini-splits are among the most efficient heating and cooling equipment you can buy. Because there are no ducts, none of the heated or cooled air leaks into attics, crawl spaces or wall cavities along the way.
In heating mode, a cold-climate mini-split can deliver two to three units of heat for each unit of electricity in mild weather, compared with exactly one for electric baseboards. The advantage shrinks as temperatures fall, but cold-climate models are designed to keep heating to roughly −25 °C to −30 °C. Look for strong SEER2 and HSPF2 ratings, and above all for published heating capacity at −15 °C and −25 °C; our guide to SEER2 and HSPF2 explains the numbers.
In baseboard-heated homes, we usually recommend keeping the baseboards as backup for the coldest nights and for bedrooms with their doors closed. The mini-split carries most of the load, and the baseboards only switch on when needed. Read more in do heat pumps work in Ottawa winters.
Indoor unit styles
Wall-mounted heads are the most common and least expensive, but they are not the only option. We will help you choose a style that suits each room.
Wall-mounted
Mounted high on an exterior or interior wall. Simple to install and service.
Ceiling cassette
Sits flush in the ceiling and spreads air in four directions. Good for open-plan rooms and basements with dropped ceilings.
Floor console
Mounted low on the wall, like a radiator. Ideal for heating and for rooms with sloped ceilings or lots of windows.
Concealed ducted
A slim unit hidden in a bulkhead or closet with short duct runs to two or three nearby rooms.
Indoor heads are quiet on low speed, often quieter than a refrigerator. Each one has washable filters you should rinse about once a month.
Built to handle an Ottawa winter
A mini-split that heats well in Toronto can still struggle in Ottawa if the installation ignores snow and ice. These details make the difference between a system that runs quietly all winter and one that ends up on a service call in February:
Height above the snow.
We mount outdoor units on wall brackets or stands so the coil stays above drifting snow and the fan can move air.
Somewhere for meltwater to go.
Each defrost cycle drips water that refreezes. We place units away from walkways, steps and driveways, where that ice would be a slip hazard.
Out of the roof drip line.
Water and ice falling from eaves can coat the fan and coil. A side wall or a small deflector solves it.
Cold-climate equipment.
We quote models with published heating capacity at Ottawa temperatures, not just a cooling rating.
If your existing mini-split is icing up, short-cycling or showing an error code, our heat pump repair team services all major ductless brands.
Heating and cooling for any room in your home
- Single-zone and multi-zone systems from all major brands
- Free estimates on every new installation
- Financing from $49/month on approved credit
- 5.0 stars from 396 Google reviews
Ductless installation, step by step
- 1
Site visit and sizing
We measure each room, estimate its heat loss and heat gain, and plan where the heads, lines and outdoor unit will go.
- 2
Approvals if needed
For condos and some townhomes, we provide the details your board needs, such as unit size, location and wall penetrations.
- 3
Outdoor unit
Mounted on a wall bracket or stand well above typical Ottawa snow depth, clear of roof drip, so it can breathe and drain all winter.
- 4
Indoor heads and line sets
Heads are mounted and lines run through the wall, inside a tidy line-hide cover outdoors. Condensate is drained by gravity or a small pump.
- 5
Wiring, vacuum and start-up
We complete the electrical connection, pressure-test and evacuate the lines, then commission each zone in heating and cooling.
- 6
Walk-through
You learn the remote or app, the filter routine and how defrost cycles look. A single zone is often done in a day; multi-zone usually takes one to three.
Frequently Asked Questions
Straight answers from licensed Ottawa technicians. Still have a question? Call us any time.
How much does a ductless mini-split cost in Ottawa?
A single-zone ductless mini-split typically costs $3,500–$6,500 installed in Ottawa. A multi-zone system with two to four indoor heads usually runs $7,000–$16,000. The price depends on the number and style of heads, line length, heating capacity and electrical work. Oria gives free estimates on all new installations, and rebates may be available for qualifying systems.
Can a mini-split heat a whole house in an Ottawa winter?
It can in many homes, especially smaller or open-plan homes with good insulation and a cold-climate multi-zone system. Heat does not move easily into closed-off rooms, though, so most Ottawa homeowners keep some backup heat, such as baseboards or a boiler, for the coldest nights. We assess your layout and heat loss before recommending a whole-home ductless setup.
Can I install a ductless mini-split in a condo?
Often, yes, but you will need your condo board’s approval first. Boards usually have rules about wall penetrations, where the outdoor unit can go and how it looks from outside. Oria can provide equipment details, sizes and a proposed layout for your application, then install once approval is in place.
How many indoor heads do I need?
Plan on one head for each area you want to control separately, such as an open main floor, a basement and a primary bedroom. Closed rooms do not share air well, so a head in the hallway will not keep bedrooms comfortable. Most multi-zone systems serve two to four heads; we size each one to the room it serves.
Will a mini-split replace my electric baseboards?
A mini-split can take over most of your heating and add air conditioning at the same time, often cutting heating costs significantly compared with baseboards. We usually recommend leaving the baseboards in place as backup for the coldest nights and for closed-off rooms. They simply stay off most of the time.
Do ductless mini-splits need maintenance?
Yes. Rinse the washable filters in each indoor head about once a month, and keep snow and leaves clear of the outdoor unit. Have the system professionally serviced every year, or twice a year if you rely on it for heating, to clean the indoor coil and blower wheel, check the drain and test the refrigerant charge.
Are ductless mini-splits noisy?
No. On low speed, indoor heads are typically quieter than a refrigerator, and the outdoor unit is usually quieter than a central air conditioner because the inverter compressor rarely runs at full speed. Mounting the outdoor unit on a proper bracket or stand with vibration pads keeps sound from travelling into the house.
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- Licensed gas & refrigeration technicians
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- 24/7 emergency service
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