Nova Scotia's Efficiency Nova Scotia rebate programs have made heat pumps one of the best investments a Halifax homeowner can make. But once you've decided to go with a heat pump, a second question comes up almost immediately: ducted or ductless mini split? The answer depends on your home — and getting it wrong means years of compromised comfort or unnecessary expense.
The Short Answer
Choose Ducted If…
- ✓ Your home already has ductwork in good condition
- ✓ You want whole-home heating and cooling from one system
- ✓ You prefer a discreet installation (no visible wall units)
- ✓ You're building new or doing a major renovation
Choose Ductless If…
- ✓ Your home has no existing ductwork
- ✓ You want to heat or cool specific zones or additions
- ✓ You're looking for the fastest installation with minimal disruption
- ✓ You want independent temperature control per room
That's the quick cut. Read on for the full picture — including costs, efficiency, rebate eligibility and the situations where neither system is the obvious winner.
How Each System Works
Ducted Heat Pumps
A ducted heat pump — sometimes called a central heat pump — connects to your home's existing forced-air duct system. An outdoor unit (the heat pump) connects to an air handler installed in your basement, utility room or attic. The air handler distributes conditioned air through your existing ducts and registers throughout the house, just like a furnace does.
The result is whole-home heating and cooling from a single system with no visible indoor equipment — just the same registers you already have. If you're replacing an aging furnace and central A/C, a ducted heat pump often slots into the same footprint with minimal additional work.
Ductless Mini Splits
A ductless mini split connects an outdoor unit to one or more indoor wall-mounted (or ceiling-cassette) units. Each indoor unit conditions the room or zone it's installed in. The refrigerant lines run through a small hole in the exterior wall — no ductwork required.
A single-zone mini split heats and cools one area. A multi-zone system connects one outdoor unit to multiple indoor heads, each individually controlled. This is how many Halifax homeowners add heat pump coverage to specific rooms, additions or zones their existing system doesn't reach well.
Efficiency: Is One Actually Better?
Both ducted and ductless heat pumps can be highly efficient, but ductless systems have an inherent efficiency advantage: no duct losses. In a typical Halifax home with older ductwork, 20–30% of the conditioned air never reaches living spaces — it leaks into walls, attic spaces and crawl spaces before it gets where you need it. Ductless systems bypass this entirely.
That said, if your home has well-sealed, well-insulated ductwork, the efficiency gap narrows considerably. And ducted systems have improved dramatically — modern cold-climate ducted heat pumps from brands like Mitsubishi, Bosch and Lennox are rated down to −25°C and maintain high efficiency in Maritime winters.
For most Halifax homes with average-condition ductwork, a ductless mini split will be measurably more efficient. For homes with newer, well-sealed duct systems, the difference is smaller.
Installation Costs in Halifax
Installation costs vary significantly based on your home's specific situation, but here are realistic ranges for Halifax and the HRM based on typical Ace Refrigeration projects:
| System Type | Typical Installed Cost* | Efficiency NS Rebate |
|---|---|---|
| Single-zone ductless mini split | $3,500 – $6,000 | Up to $2,000 |
| Multi-zone ductless (2–3 zones) | $7,000 – $14,000 | Up to $5,000 |
| Ducted heat pump (existing ducts) | $5,000 – $10,000 | Up to $5,000 |
| Ducted heat pump (new ductwork) | $12,000 – $20,000+ | Up to $5,000 |
*Ranges are estimates only. Final cost depends on home size, existing infrastructure and equipment selection. Rebate amounts subject to Efficiency Nova Scotia program terms.
The most important cost variable for ducted systems is your existing ductwork. If your Halifax home has functional forced-air ducts, a ducted heat pump can be highly cost-competitive. If you need to install new ductwork, the economics shift significantly in favor of ductless.
Comfort and Zone Control
One significant advantage of ductless multi-zone systems is independent temperature control. Each indoor head has its own thermostat — so the person who runs hot can keep their bedroom cooler while the rest of the house is warmer. In homes where family members have different comfort preferences or where certain rooms are used at different times, this is a meaningful quality-of-life improvement.
Ducted systems deliver the same temperature to every room on the same zone. You can add zoning dampers to a ducted system for some zone control, but it adds cost and complexity. Ductless multi-zone delivers zone control inherently.
On the other hand, ducted systems deliver conditioned air more evenly throughout each room via ceiling registers. Some homeowners find the airflow from wall-mounted ductless heads less comfortable, particularly in larger rooms. Ceiling cassette indoor units address this and are available for ductless systems — at higher cost.
The Halifax-Specific Consideration: Cold Climate Performance
Nova Scotia winters test heat pumps. A system rated to −15°C will lose efficiency and eventually stop heating on the coldest Halifax nights. Both ducted and ductless options now include cold-climate versions rated to −25°C or lower — but not all equipment sold in Halifax meets this standard.
Whatever system type you choose, Ace Refrigeration installs only cold-climate-rated equipment for primary heating applications. We size equipment to your home's heat loss calculations, not to a rule of thumb. This is why proper sizing matters — an undersized system will fail to heat your home on the coldest nights, while an oversized system will short-cycle and reduce efficiency.
Which One Is Right for Your Home?
The honest answer is: it depends on your home, and a proper assessment will tell you more than any guide can. But here's how to think about it:
If you have functioning forced-air ductwork and you want to replace your central heating system, a ducted heat pump is almost certainly your best option. It will use your existing infrastructure, keep your home's aesthetic intact, and give you whole-home heating and cooling.
If your home has no ductwork — older Halifax homes with radiators or baseboards, additions, cottages — ductless mini splits are the practical choice. Adding ductwork to these homes is invasive and expensive; ductless installs in a day or two with minimal disruption.
If you want to heat specific areas — a home office, a basement renovation, a sunroom — ductless mini splits give you targeted conditioning without reworking your whole system.
If you're building new, the calculation becomes a design decision rather than a retrofit one, and both options are worth evaluating with your builder and HVAC contractor together.