Ducted heat pump or ductless mini-split? Choosing for a Canadian home

If your home already has ducts in good condition, a central ducted heat pump usually gives the most even heat and cooling for the money, because one system serves every room through registers you already have. If it has no ducts, as is common in electric-baseboard homes, radiator homes and many Quebec and Atlantic Canadian houses, ductless mini-splits avoid the cost and disruption of adding ductwork and can carry most of the heating load with one or a few wall heads, while baseboards or the boiler cover the rooms the heads cannot reach. The deciding questions are layout (how open the floor plan is), how many rooms truly need direct heat, and how cold your design temperature is.

This guide is part of how to compare HVAC quotes. Prices are illustrative.

How the options differ

Option	How heat reaches rooms	Strengths	Limits
Central ducted heat pump	Air handler or furnace blower and existing ducts	Whole-house heat and cooling, hidden equipment, filtration	Needs adequate ducts; duct leaks in unheated spaces waste heat
Single-zone ductless	One wall head per outdoor unit	Lowest cost entry; very efficient in open areas	Closed rooms get little heat; one head cannot heat a whole multi-room house
Multi-zone ductless	Several heads on one outdoor unit	Heat and cooling in several rooms without ducts	Higher cost per head; the outdoor unit may run inefficiently when only one small head calls for heat
Several single-zone systems	Separate outdoor units per area	Each zone sized and controlled independently	More outdoor units and wall penetrations
Short-run ducted (slim ducted)	Concealed unit with short ducts to a few rooms	Serves bedrooms without wall heads	Needs space in ceilings or closets

Worked example: a 1960s electric-baseboard bungalow

Illustrative figures for a 1,100 sq ft bungalow with a basement, heat loss about 24,000 BTU/h (2 tons), open living/kitchen area and three bedrooms.

Option 1: one single-zone head in the main living area. 1.5 tons at $3,800–$5,500 per ton: $5,700–$8,250, plus $600 for a circuit and wall bracket: $6,300–$8,850. The head heats the open area and, with doors open, part of the hallway. Bedrooms and the basement keep their baseboards.

Option 2: multi-zone with heads in the living area and two bedrooms. 2.5 tons at $4,500–$6,500 per ton: $11,250–$16,250, plus $900: $12,150–$17,150.

Option 3: add ductwork and a central heat pump. Ducts for a finished bungalow could add $6,000–$12,000 to a ducted heat pump of $9,500–$13,500 for 2 tons: roughly $15,500–$25,500, with disruption to finished ceilings.

If baseboards supplied 18,000 kWh of heat a year at an illustrative $0.10 per kWh (a low-rate province), and Option 1 takes over 60% of that at a seasonal COP of 2.6, the saving is 18,000 × 0.6 × 0.10 × (1 − 1 ÷ 2.6) ≈ $665 a year. Option 2 might cover 85%: 18,000 × 0.85 × 0.10 × (1 − 1 ÷ 2.6) ≈ $942 a year. The extra ~$277 a year for Option 2 must repay a price difference of about $5,850–$8,300, which takes decades unless a rebate or cooling value tips the balance. That is why a single well-placed head is often the best value in open-plan electric homes. Test your own numbers with the payback calculator.

Questions that decide the layout

Where is heat lost most? Use the room-by-room heat loss calculation.
How open is the floor plan? Wall heads distribute heat well in open spaces and poorly through closed doors.
Do bedrooms need cooling? If yes, a head or slim ducted unit for the bedroom level may be worth it.
Where can the outdoor unit go? It needs clearance above snow, away from roof drip lines and bedroom windows (noise), and within line-set reach.
What happens in deep cold? Keep baseboards, the boiler or the furnace as backup and confirm capacity at your design temperature.
Ducts condition. If you have ducts, ask for a static pressure test and inspection; leaky or undersized ducts reduce a heat pump's comfort and efficiency.

Installation details worth checking

Line-set route and covers on the exterior wall, and sealing of the wall penetration.
Condensate drainage for each head, especially in winter when defrost water from the outdoor unit can freeze on walkways.
A dedicated circuit and outdoor disconnect, installed under an electrical permit.
Head placement high on walls with clear airflow, away from furniture.
Controls: a separate remote or wall controller for each head, and settings to avoid fighting the baseboards (set baseboard thermostats a few degrees below the head's set point).

Program and tax notes

Some programs require cold-climate models or specific capacities, and some have set different rules for ductless and ducted systems or for homes keeping electric baseboards. Confirm in the 2026 program guide. Tax treatment is the same as other heat pumps; see GST/HST and PST. If the home has an oil boiler or furnace today, the oil conversion worked example shows the extra steps, and the running-cost comparison explains how to estimate savings against baseboards, gas or oil.

FAQ

Can one mini-split heat a whole house?

In a small, open, well-insulated home, one head can supply much of the heat, but rooms behind closed doors will be cooler. Most homes keep some backup heat.

Are multi-zone systems less efficient?

Multi-zone outdoor units can be less efficient than single-zone units when only one small head is running. Separate single-zone systems avoid that, at the cost of more outdoor units.

Do ductless heads need cleaning?

Yes. Filters should be cleaned regularly and coils and blower wheels serviced periodically to prevent airflow loss and odours.

Sources

Natural Resources Canada — air-source heat pump guide, ductless systems and qualified products
Hydro-Québec — heat pumps in electrically heated homes
Efficiency Nova Scotia — ductless heat pump programs in Nova Scotia
Electrical Safety Authority (Ontario) — electrical permits
HRAI — heating and cooling contractor training