Ducted vs Ductless Heat Pump: Which Costs Less in an Existing Home
Ducted, hybrid and ductless multi-zone heat pumps cost differently installed in an existing home — here's how the numbers actually compare.
A heat pump installation in Canada typically runs $9,350 – $15,600 CAD installed, with a mid-range system averaging $12,000 before GST/HST. But that single number hides a real decision: in an existing home, a ducted system, a dual-fuel hybrid, and a ductless multi-zone setup can land tens of thousands of dollars apart once you account for what's already in the house.
Three ways to heat the same house
Our cost guide for this project (Heat pump installation) prices the job as a single number, but most homeowners are really choosing between three different pieces of equipment:
| Material | Typical | Usual range | Lifespan |
|---|---|---|---|
| Ductless multi-zone (whole home) | $10,900 | $8,450 – $14,100 | – |
| Ducted air-source heat pump | $12,000 | $9,350 – $15,600 | – |
| Dual-fuel hybrid (keeps gas furnace) | $13,000 | $10,100 – $16,900 | – |
- Ducted air-source heat pump replaces your furnace as the sole heat source, using your existing ductwork. It's the cheapest route if your ducts and electrical service are already adequate.
- Dual-fuel hybrid keeps your gas furnace in place and adds a heat pump that handles most of the heating season, switching to gas only on the coldest days. A typical hybrid retrofit runs around $13,000.
- Ductless multi-zone skips ducts entirely, running refrigerant lines to wall-mounted or ceiling heads in each room — the go-to option for homes with no ductwork, such as older houses with radiators or baseboard heat.
Why the "cheapest" option isn't always ducted
On paper, a straight ducted swap looks like the budget choice. In practice, two things push the ducted price up in older homes:
Your ducts. Heat pumps move more air at lower temperatures than a furnace, so undersized or leaky ductwork that was fine for gas heat often needs resizing or sealing before a ducted heat pump will perform. That's not in the headline number — it shows up as a change order once the installer opens up the system.
Your panel. A heat pump is a bigger electrical load than most furnaces. Homes with an older 100 A panel sometimes need an upgrade before the installer will connect the unit, which is a separate job on top of the heat pump itself.
Neither of these applies to a dual-fuel hybrid in the same way, because the furnace and its ductwork are already doing most of the heavy lifting — the heat pump is just added capacity. That's part of why hybrid systems, despite having two sets of equipment, aren't necessarily the most expensive option once retrofit costs are counted.
The furnace detail that changes the comparison
If you're weighing a hybrid system against a straight furnace or heat pump replacement, there's a rule worth knowing before you get quotes: under federal regulations, gas furnaces manufactured from July 2019 onward must meet a minimum efficiency of 95% AFUE, with only narrow exceptions for through-the-wall units and manufactured-home replacements. In plain terms, you can't buy a cheaper, lower-efficiency furnace as a way to save money on the gas side of a hybrid system — any new furnace sold today is already a high-efficiency, condensing unit, which usually means new PVC venting as well. It's worth checking this against our furnace guide (Furnace replacement) if a hybrid quote includes furnace work, since that venting change is a common add-on that catches people off guard.
Ductless multi-zone: the no-ducts option, priced differently
If your home has no forced-air ductwork at all — electric baseboards, hot water radiators, or an old boiler — ductless multi-zone is usually the only realistic heat pump route, and it's priced per zone rather than per system size. More rooms mean more indoor heads, more refrigerant lines, and a bigger outdoor unit, so the cost scales with how many areas of the house you want covered rather than with square footage alone. It's also the system most directly comparable to the cooling-only option many homeowners already have: if you're really trying to decide between adding air conditioning and adding year-round heating and cooling, our air conditioning guide (Ductless mini-split) prices the cooling-only version of the same ductless hardware.
Where rebates change the maths — and where they don't
In Ontario, the Home Renovation Savings program can take up to $7,500 off a cold-climate air-source heat pump in an electric, oil, propane or wood-heated home, or up to $2,000 for gas-heated Enbridge customers — but it requires pre-approval and a participating contractor before work starts, and the smaller amount for gas-heated homes narrows the gap between a straight heat pump swap and a hybrid system. Outside Ontario, we're not aware of an equivalent program right now, so budget on the unrebated figures above unless your utility or municipality tells you otherwise. We'd rather say that plainly than guess at numbers that don't apply to your province.
Getting the comparison right
Because ductwork condition, panel capacity and zoning needs vary so much house to house, the single biggest cost driver often isn't the equipment tier — it's what the installer finds once they're on site. When quotes come in, ask specifically whether duct modifications or a panel upgrade are included, and whether the number is for ducted, hybrid, or ductless equipment, since contractors don't always spell that out. If you want a second opinion on whether a quote lines up with what similar jobs cost locally, our "is my quote fair" tool is built for exactly that comparison.