Comparison Checklist
Requires ductwork
Installation cost
Zone control
Efficiency rating
Aesthetic impact
Heating capability
| Option | Best For | Watch For | Fit |
|---|---|---|---|
| Central air conditioning | Homes with existing ductwork in good condition that want whole-home cooling from a single system. | Ductwork leaks or poor sizing can waste 20–30% of cooling capacity. Duct inspection should be part of any AC quote. | Standard choice for most Toronto homes with forced-air heating already in place. |
| Ductless mini split | Homes without ductwork, additions, finished basements, attic bedrooms, or rooms with persistent hot spots. | Each indoor head cools one zone. Whole-home coverage with mini splits alone can require 3–5 heads and higher upfront cost. | Best for targeted cooling or homes where ductwork installation is impractical. |
| Hybrid setup (central + mini split) | Homes where most rooms are served by ductwork but one or two areas need independent cooling. | Requires coordinating two systems. A programmable thermostat strategy helps avoid overlap. | Practical for older Toronto homes with additions or converted attics. |
Ductwork is the deciding factor
If your Toronto home already has ductwork for a furnace, central AC is usually the simplest and most cost-effective cooling option.
If the home has no ducts, adding them can cost $3,000 to $7,000 and may not be practical in finished spaces. Ductless mini splits avoid that cost entirely.
Efficiency and operating costs
Ductless mini splits are typically more efficient than central AC because they avoid duct losses and use inverter-driven compressors that adjust output.
A central AC system with well-sealed ductwork and a high SEER2 rating can close the efficiency gap. Both options qualify for rebates when paired with a heat pump.
What to ask before choosing
How is the existing ductwork? Which rooms run hot? Is the home a bungalow, two-storey, or split-level? Are there additions or finished spaces without vents?
GTA HVAC Pros reviews layout, ductwork condition, comfort complaints, and budget before recommending central AC, ductless, or a combination.