Heat Pumps, Furnaces and Air Conditioning in Ontario (2026): Heat Pump Cost, Cold-Climate Units, Mini-Splits, Dual Fuel, Central Air, Furnace Replacement and Sizing

Heating, Cooling & VentilationHeat pumps and AC

Heat Pumps, Furnaces and Air Conditioning: What Each One Costs, What It Does at Minus 25, and Why the Size on the Quote Matters More Than the Brand

Ducted and ductless heat pumps, dual fuel, central air and furnaces. Central Ontario installed prices, October 2026.

A heat pump is an air conditioner that also runs backwards, and a cold-climate one keeps heating well below minus 20. That makes it the default answer for a lot of Ontario houses now, but not all of them, and the arguments I hear are almost never about the right thing. The right thing is the heat loss of your house, the capacity of the unit at your design temperature, and what happens on the coldest night. Get those three right and the brand is a detail.

Heat pump or gas? Heat pump cost The sizing mistakes

The numbers

Central Ontario, installed, before HST, checked October 2026. Published prices for the same job vary widely; these are the defaults the calculators use.

$13,000cold-climate ducted, 3 tons, existing ducts ($9,000 to $18,000)
$5,500single-zone mini-split ($3,500 to $8,000)
$6,000central AC, existing ducts ($3,500 to $8,500)
$6,000gas furnace swap ($4,000 to $9,000)

The guides

Heat pump cost in Ontario

Standard vs cold-climate ducted, the all-electric conversion, the new house, mini-splits, the electrical and three houses priced.

Cold-climate heat pumps at minus 25

Already on the site: what makes a unit cold-climate, whether it carries the house, and the three kinds of backup.

Ductless mini-split cost

Single zone by size, multi-zone, several singles against one multi, line sets, condensate and the cost per head.

Ducted vs ductless

Which one when: existing ducts, no ducts, radiant houses, closed bedrooms, comfort, noise and cost.

Dual fuel: heat pump plus furnace

How the switchover works, the economic balance point, the controls, the cost, and when it beats all-electric.

Gas vs heat pump operating cost

Already on the site: the arithmetic per delivered kWh, with your own rates.

Central air conditioning cost

AC by size, existing ducts against new, SEER2, the electrical, and why a heat pump now costs little more.

Furnace replacement cost

Repair or replace at 15 to 20 years, two-stage vs modulating, venting, the January premium, and the heat pump question.

HVAC sizing mistakes

Oversizing, sizing from square feet or the old furnace sticker, short-cycling, summer humidity, and what an ICF house needs.

Rules I give every customer

  1. Size it from a heat loss. Not the square footage, not the old furnace. OntarioHeatLoss.ca does the CSA F280.
  2. Read the capacity at minus 25, not at 8.3 C. The model number goes on the NRCan list and the low-temperature capacity goes on the quote. What cold-climate means.
  3. Plan the backup. Electric strips, the existing furnace, or a properly sized unit that barely needs either. Dual fuel.
  4. Check the ducts and the panel before the outdoor unit. Heat pumps want more airflow than old furnaces, and a 200 A service is not always there. 100 or 200 amp.
  5. Nobody sells you a furnace or an air conditioner at your door. In Ontario that contract is void unless you called them first. Who should be doing the work.

Have quotes in hand? Let a builder read them first

For $99, I put up to three heat pump, furnace, boiler, AC, HRV or water heater quotes on one grid: whether a heat loss was done, the model numbers checked against the cold-climate list, the capacity at your design temperature, what each one left out in dollars (ducts, electrical, condensate, venting, commissioning, the old unit), the rebate claim checked, and a plain answer on which to sign. No contractor behind it and no commission on who you hire.

HVAC quote review, $99 Heat loss and HVAC design Check the quotes yourself first

Sources and further reading

  • Heating and Cooling With a Heat Pump: Natural Resources Canada: how air-source, ductless, ground-source and air-to-water heat pumps work in a Canadian climate, sizing, backup heat and balance points.
  • NRCan Searchable Product List: where you check that the exact outdoor and indoor model numbers on a quote are a listed cold-climate heat pump.
  • Home Renovation Savings: heat pumps: the heat pump rebate by existing heating fuel, the per-ton rule, pre-approval through a participating contractor and the new-build exclusion.