Quick answer: what a mini-split costs in Ottawa
Single zone (one outdoor unit, one indoor head)
$3,500 to $6,500 installed.
Multi-zone (one outdoor unit, two to four heads)
$7,000 to $16,000 installed.
Ducted cold-climate heat pump, for comparison
$9,000 to $18,000 with existing ducts.
Best fits
Homes with baseboard heaters or hot water radiators, additions, finished basements, sunrooms and hot upstairs bedrooms.
Winter
Cold-climate models are built to keep heating in Ottawa’s −25 °C cold snaps, though output drops as it gets colder, so keep your existing heat as backup.
Sizing
Size for heating, not cooling, using a room-by-room heat loss calculation.
These are typical Ottawa installed ranges in CAD before rebates, not quotes. Your final price depends on the home, the equipment and the electrical and line set work. Oria gives free estimates on new installations.
Ductless mini-split cost by system type
| System | Typical installed cost (Ottawa) | Good for |
|---|---|---|
| Single-zone, small head (9,000 to 12,000 BTU/h) | Lower half of $3,500 to $6,500 | Bedroom, home office, small addition, garage workshop |
| Single-zone, large head (18,000 to 24,000 BTU/h) | Upper half of $3,500 to $6,500 | Open-concept main floor, large finished basement |
| Multi-zone, 2 heads | Lower part of $7,000 to $16,000 | Main floor plus primary bedroom, or two finished levels |
| Multi-zone, 3 to 4 heads | Upper part of $7,000 to $16,000 | Whole small home, bungalow or baseboard-heated house |
| Ducted cold-climate heat pump | $9,000 to $18,000 | Homes with good existing ductwork |
Cold-climate models with stronger low-temperature heating usually cost more than standard models of the same size, but in Ottawa they are almost always worth it if you plan to heat with the system.
What pushes the price up or down
Capacity and efficiency
Bigger outdoor units and cold-climate models cost more.
Indoor head style
Wall-mounted heads are the most affordable. Floor consoles, ceiling cassettes and slim concealed-duct units cost more to buy and install.
Line set length and route
The refrigerant lines between the indoor and outdoor units add cost the longer they run. Covered line hides on the exterior wall look neater and add a little more.
Electrical work
Most systems need a dedicated 240 V circuit. Older homes with a full or 100 A panel may need panel work, done by a licensed electrician with a permit where required.
Outdoor mounting
In Ottawa the outdoor unit should sit on a stand or wall bracket above the snow line and away from roof drip edges, so ice does not build up on it.
Condensate drainage
Heads on interior walls or in basements may need a condensate pump instead of a simple gravity drain.
Where a ductless mini-split makes sense
Mini-splits shine in homes and rooms that ducts do not serve well. These are the most common Ottawa situations where we recommend one.
Homes heated with electric baseboards
Baseboards turn one unit of electricity into one unit of heat. A heat pump moves heat instead of making it, so in mild and shoulder-season weather it can deliver two to three times as much heat for the same electricity. Older Ottawa homes, cottages and many Gatineau homes on baseboards see the largest drop in heating bills.
Homes with hot water radiators
Boiler-heated homes in older neighbourhoods have no ducts for central air. A multi-zone mini-split adds quiet air conditioning and efficient heating without tearing open walls, while the boiler stays as backup heat. See our boiler services if your boiler also needs attention.
Additions, basements, sunrooms and bonus rooms
Extending ductwork to a new addition or the cold room over a garage is often expensive and still leaves the space uncomfortable. A single-zone head gives that room its own thermostat.
Rural homes on propane or oil
In areas like Greely, Carp, Kemptville and Richmond, propane and oil are delivered in large lump-sum fills and prices swing. A mini-split heating the main living area in fall and spring reduces fuel deliveries and spreads heating costs across monthly hydro bills.
When ductless is not the best choice
If your home already has good ductwork and a furnace, a ducted cold-climate heat pump usually heats and cools every room more evenly. Our heat pump cost guide compares both.
Heating performance in an Ottawa winter
Modern cold-climate mini-splits are built for winters like ours. Many are rated by their manufacturers to keep running down to about −25 °C to −30 °C, which covers Ottawa’s design temperature of about −25 °C.
Output and efficiency still drop as it gets colder. A unit that easily heats a room at 0 °C may only just keep up at −25 °C, and it pauses briefly for defrost cycles that melt frost off the outdoor coil. That is why we size carefully and leave baseboards, a boiler or a furnace in place for the coldest nights.
Ratings to look for
ENERGY STAR cold climate
For ductless split systems, the U.S. EPA criteria call for at least 8.5 HSPF2 and 15.2 SEER2.
COP at −15 °C (5 °F) of at least 1.75
The unit still delivers 1.75 units of heat per unit of electricity at that temperature.
Published capacity at −15 °C and −25 °C
Ask for the heating output at those temperatures, not just the nominal size.
Our guide to SEER2, AFUE and HSPF2 ratings explains these numbers in plain language, and do heat pumps work in Ottawa winters covers cold-weather performance in more depth.
Sizing a mini-split for an Ottawa home
In Ottawa, size a mini-split for heating. A unit sized only for summer cooling will usually be too small in January.
| Space (well-insulated) | Typical head size |
|---|---|
| Bedroom or office, 150 to 350 sq ft | 9,000 BTU/h |
| Large room or small open area, 350 to 550 sq ft | 12,000 BTU/h |
| Open main floor, 550 to 900 sq ft | 18,000 BTU/h |
| Large open area or finished basement, 900 to 1,300 sq ft | 24,000 BTU/h |
Treat this as a starting point only. Drafty older homes, big windows, cathedral ceilings and rooms over garages need more capacity. A room-by-room heat loss calculation gives the real answer.
Common sizing mistakes
- Oversized heads in small rooms: they short-cycle, dehumidify poorly in summer and waste energy.
- Too many heads on one outdoor unit: a multi-zone outdoor unit has a fixed total capacity, so it must cover the combined heating load on a cold night.
- Expecting one head to heat a whole floor of closed rooms: warm air does not travel well through hallways and closed doors.
Single-zone or multi-zone?
A multi-zone system uses one outdoor unit for several heads, which saves exterior wall space and often costs less than buying the same number of single-zone systems.
Several single-zone systems have their own advantages. Each outdoor unit is matched exactly to its room, efficiency at low loads is often better, and if one outdoor unit fails, the other rooms keep heating. For a baseboard-heated home relying on mini-splits as the main heat, that redundancy matters in an Ottawa February.
Maintenance, rebates and financing
Rinse the washable filters in each head about once a month during heavy use, keep snow and ice clear of the outdoor unit, and book a professional cleaning of the indoor coil and blower wheel about once a year. A maintenance plan keeps that on schedule.
Rebates may be available for qualifying heat pumps. Oria will check current programs for your home; see our HVAC rebates page. Financing is available on approved credit, with plans from $49/month.
Oria Heating and Cooling has installed and serviced heating and cooling in Ottawa since 2005, with refrigeration-licensed technicians and a 5.0-star Google rating from 396 reviews. To price a system for your home, visit our ductless mini-split installation page or call (613) 866-1869 for a free estimate.
Frequently Asked Questions
How much does a ductless mini-split cost in Ottawa?
A single-zone ductless mini-split typically costs $3,500 to $6,500 installed in Ottawa, and a multi-zone system with two to four indoor heads typically costs $7,000 to $16,000. The price depends on capacity, whether you choose a cold-climate model, the style of indoor heads, line set length and any electrical upgrades. Rebates may reduce the final cost.
Can a ductless mini-split heat my whole house in Ottawa?
It can in smaller, well-insulated homes and open-concept bungalows, usually with a multi-zone system or several single-zone units. In homes with many closed rooms, heat does not spread well from one head. Most Ottawa homeowners keep their existing baseboards, boiler or furnace as backup for the coldest nights around −25 °C.
Do mini-splits work at −25 °C?
Cold-climate mini-splits are designed to keep heating in very cold weather, and many are rated by their manufacturers to operate down to about −25 °C to −30 °C. Their heating output and efficiency drop as temperatures fall, and they run short defrost cycles. Proper sizing and a backup heat source keep the home comfortable during Ottawa cold snaps.
What size mini-split do I need for one room?
For a well-insulated bedroom or office of 150 to 350 square feet, a 9,000 BTU/h head is common. A 350 to 550 square foot room often needs 12,000 BTU/h, and open areas need 18,000 to 24,000 BTU/h. In Ottawa, size for winter heating rather than cooling, and confirm with a heat loss calculation.
Is a mini-split cheaper to run than electric baseboards?
Yes, in most conditions. Electric baseboards turn each unit of electricity into one unit of heat, while a heat pump moves heat from outdoors and can deliver two to three times as much heat per unit of electricity in mild weather. The advantage shrinks in deep cold, but over a full Ottawa season most baseboard-heated homes see lower heating costs.
Single-zone or multi-zone mini-split: which is better?
Multi-zone systems use one outdoor unit for two to four heads, saving wall space and often costing less than the same number of separate systems. Single-zone systems match each outdoor unit to one room, run efficiently at low loads and keep other rooms heating if one unit fails. The right choice depends on your layout and how much you rely on it.
How long does a mini-split installation take?
A single-zone wall-mounted mini-split is often installed in one day, including mounting the head and outdoor unit, running the line set, electrical connection and start-up. Multi-zone systems with several heads, long line runs or electrical panel work can take two days or more. Your technician will give you a timeline during the free estimate.
Related Reading
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