R32 Heat Pumps in Ontario:
Cost, Rebates, Safety, and Which Brands Actually Use It

By the Solar X HVAC Engineering Team. Reviewed by the Solar X Engineering Team. ESA/ECRA Licensed Electrical Contractor, Licence 7017538. Published July 8, 2026. Last verified July 8, 2026. 11 min read.

The Plain English Version

A refrigerant is not fuel. It never burns and it never runs out under normal operation. It is a fluid sealed inside a closed loop that does one job: pick up heat in one place and drop it somewhere else. In an Ontario winter, your heat pump uses it to pull heat out of cold outdoor air and push that heat into your house. In July, the loop runs backwards and dumps indoor heat outside.

For roughly fifteen years, almost every heat pump and central air conditioner sold in Canada ran on a refrigerant called R410A. It works fine. The problem is what happens on the rare occasion it leaks: one kilogram of escaped R410A traps as much heat in the atmosphere as about two tonnes of carbon dioxide. Federal regulations are phasing it out of new equipment, and R32 is one of the two refrigerants that replaced it.

Solar X installs R32 based cold climate heat pumps across Ontario as part of our residential heating, solar, and battery packages, and we handle every ESA permit, load calculation, and rebate application ourselves. See our residential solar and heat pump solutions or book a free assessment.

What Is R32 Refrigerant?

R32, chemical name difluoromethane, is a single compound refrigerant. That detail matters more than it sounds. R410A, the refrigerant it replaces, is actually a 50/50 blend of two chemicals: R32 and R125. Manufacturers eventually proved that R32 on its own does the job, minus the half of the blend responsible for most of the climate impact.

Three facts cover most of what a homeowner needs to know:

1. It moves more heat per kilogram than R410A. A system needs a smaller refrigerant charge for the same output, which is part of why R32 units can use up to about 10 percent less electricity than an equivalent older R410A unit.
2. Its global warming potential is 675. R410A sits at 2,088. If refrigerant ever leaks, and properly installed systems rarely leak, R32 traps roughly one third as much heat over 100 years.
3. It is classified A2L, meaning mildly flammable. That is the tradeoff for the lower climate impact. It is not explosive, it is nothing like propane, and it comes with specific installation and servicing rules. Those rules are one more reason Ontario requires a licensed contractor for this work.

One myth worth killing early: R32 has zero ozone depletion potential, and so does R410A. Neither touches the ozone layer. The ozone problem belonged to R22, which Canada finished phasing out in 2020. R32 solves a greenhouse gas problem, not an ozone problem.

Why Canada Is Moving Off R410A

This shift is federal law, not a sales pitch. Environment and Climate Change Canada controls refrigerants under the Ozone depleting Substances and Halocarbon Alternatives Regulations, which carry out Canada's commitments under the Kigali Amendment to the Montreal Protocol. The schedule cuts national HFC consumption in steps: 10 percent starting in 2019, 40 percent starting in 2024, and further steps toward an 85 percent reduction by 2036.

The practical result: manufacturers redesigned new residential heat pumps and air conditioners around lower GWP refrigerants starting in 2025. R32 and R454B are the two survivors, both approved for Canadian homes under the updated mechanical refrigeration code, CSA B52, which was amended specifically to allow A2L refrigerants.

If you already own an R410A system, nothing changes for you. Existing systems stay fully legal to run, service, and recharge for their entire working life. The rules restrict the manufacture and import of new equipment, not equipment already bolted to your house.

R32 vs R410A vs R454B

Three honest notes on this table. Lower GWP is better for the climate, no caveats. Neither A2L refrigerant is dangerous when installed to code by a licensed contractor, and Canadian codes were rewritten specifically so they could be used safely. And none of these three are interchangeable: every system is engineered for one refrigerant only, so retrofitting an R410A unit to run R32 is not a thing.

Which Brands Actually Use R32 in Canada

Here is the part most articles fudge. Refrigerant is a manufacturer decision, so "R32 heat pump" and "good heat pump" are not the same shopping list. The honest breakdown for the cold climate brands Solar X installs in Ontario:

• Daikin runs R32 across its newer cold climate lines, including the FIT and Aurora series. Daikin developed R32 as a refrigerant and has used it internationally since the mid 2010s.
• Fujitsu, sold in North America under the GENERAL brand, uses R32 in its newest AIRSTAGE H Series, including the Orion XLTH+ single zone and Aquila XLTH multi zone systems.
• Mitsubishi's newest cold climate ductless lines moved to R454B rather than R32, with remaining R410A inventory selling through while supply lasts.
• Carrier, Lennox, and Bosch ducted equipment sold in Canada in 2026 is predominantly R454B, in line with the broader shift in ducted residential systems.

If R32 specifically matters to you, say so during your free assessment. Solar X confirms the exact refrigerant on the specific model and tonnage we recommend, in writing, before you sign anything.

Does R32 Change Your Ontario Rebate? No, and Here Is Why

The Home Renovation Savings Program (HRSP), delivered through Save on Energy and Enbridge Gas, pays on two things: the heating capacity of the system in tons, and what your home heats with today. Refrigerant type is not a factor. An R32 system and an R454B system of the same tonnage earn the same rebate.

Two hard rules that decide whether you get paid at all. First, the equipment must appear on Natural Resources Canada's cold climate heat pump qualified products list, whatever refrigerant it runs. Second, the HRSP application must be submitted and approved before equipment is purchased. Retroactive applications are rejected, no exceptions. Solar X is a registered Save on Energy contractor and files this application on your behalf before anything is ordered.

For how the heat pump rebate stacks with the $5,000 solar and $5,000 battery HRSP amounts, see our Solar Panels and Heat Pumps Ontario guide.

What an R32 Heat Pump Costs in Ontario (2026)

These are current Ontario market ranges, not quotes. The real number for your home depends on ductwork condition, electrical panel capacity, and the tonnage a proper load calculation lands on. Solar X never sizes a system from square footage alone. Every quote starts with a licensed HVAC load calculation and your last 12 months of actual utility data.

Is R32 Safe in a Home?

Yes, when installed and serviced by a licensed contractor, and here is what the A2L label actually means in practice:

• Mildly flammable is not explosive. R32 has a low burning velocity and only ignites under a narrow combination of concentration and ignition source that a correctly installed residential system does not produce.
• The codes were written for it. Canadian building codes reference CSA B52, the mechanical refrigeration code, which sets defined charge limits, ventilation rules, and leak detection requirements for A2L refrigerants in homes.
• Licensed installation is mandatory in Ontario regardless. Any heat pump installation involving an electrical connection requires an ESA permit and a licensed electrical contractor. Solar X holds ECRA/ESA Licence 7017538 and manages every permit and inspection start to finish.
• Zero ozone impact. Whatever else you weigh, the ozone question does not apply to R32 at all.

Do R32 Heat Pumps Survive an Ontario Winter?

Refrigerant does not decide cold weather performance. Compressor design and the model's cold climate rating do. What matters is whether the unit is a genuine cold climate air source heat pump, rated to hold capacity well below freezing, and whether the exact model number appears on the NRCan qualified list.

Real reference points from R32 models on the Canadian market: Daikin's Aurora series holds full rated heating capacity at minus 15 degrees Celsius and keeps operating down to minus 25, and Fujitsu's Orion XLTH+ operates down to minus 30 degrees Celsius while retaining roughly 90 percent of capacity at that temperature. Both are legitimate primary heat sources for Ontario when sized correctly.

The warning that protects you: a budget unit rated only to minus 10 degrees Celsius is not a primary heat source for an Ontario winter, R32 or not, no matter what the sticker price suggests.

How a Solar X Heat Pump Project Runs, Start to Finish

1. 1

   We pull your last 12 months of hydro and gas bills

   Real consumption drives sizing, not square footage guesses.

2. 2

   Licensed HVAC load calculation

   This sets the tonnage before any equipment is discussed.

3. 3

   HRSP application filed before purchase

   This is the step that protects your rebate. Skip it and the money is gone.

4. 4

   Equipment confirmed in writing

   Brand, model, tonnage, and refrigerant, so there are no surprises at install.

5. 5

   Installation by ESA/ECRA licensed technicians

   Any electrical panel upgrade is handled first if needed.

6. 6

   ESA inspection and commissioning

   The system is inspected and commissioned before handover.

7. 7

   Post installation HRSP paperwork filed for you

   Once the post installation application is approved, the rebate cheque arrives by mail within 60 days.

No install date and no rebate is guaranteed until permits, inspection, and program approval are complete. Solar X will never ask you to buy equipment before your HRSP approval is in hand. Any installer who does is transferring the program's risk onto you.

Frequently Asked Questions

Sources

• Environment and Climate Change Canada, Ozone depleting Substances and Halocarbon Alternatives Regulations: canada.ca, ODSHAR regulations
• Natural Resources Canada, cold climate heat pump qualified products list: spl-lpi.nrcan-rncan.gc.ca
• Save on Energy, Home Renovation Savings Program: saveonenergy.ca/homerenovationsavings
• Ontario Energy Board, electricity rates: oeb.ca/consumer-information-and-protection/electricity-rates
• Fujitsu General, Next Generation Refrigerants, R32: fujitsugeneral.com