R-410A Phase-Out Canada 2026: What Ontario Homeowners Need to Know

What Is R-410A and Why Is It Being Phased Out?

R-410A (commonly sold under the brand name Puron) has been the standard refrigerant in residential air conditioners and heat pumps since the early 2000s. It replaced R-22 (Freon), which was phased out because it depleted the ozone layer. R-410A solved the ozone problem, but it created a different one.

R-410A has a Global Warming Potential (GWP) of 2,088. That means one kilogram of R-410A released into the atmosphere has the same warming effect as 2,088 kilograms of CO2. For context, a typical residential AC system contains 3 to 6 kilograms of refrigerant.[1]

In 2016, countries agreed to the Kigali Amendment to the Montreal Protocol, committing to phase down high-GWP hydrofluorocarbons (HFCs) like R-410A. Canada ratified the Kigali Amendment in 2017 and has been implementing a stepdown schedule for HFC production and import quotas ever since.[2][6]

The Phase-Down Timeline for Canada

It is important to understand that this is a phase-down, not a phase-out. Canada is not banning R-410A overnight. Instead, the total quantity of HFCs that can be produced and imported into Canada is being reduced in steps:[1]

The practical effect: R-410A is becoming scarcer and more expensive with each step. Equipment manufacturers have been transitioning their new product lines to lower-GWP refrigerants, primarily R-454B, since 2023-2025. By 2026, most major manufacturers offer R-454B versions of their residential product lines.[4]

R-454B: The Replacement Refrigerant

R-454B (marketed by Chemours as Opteon XL41) is the HVAC industry's primary choice to replace R-410A in residential systems. Here is how they compare:

The Flammability Question

The most common concern about R-454B is its A2L classification, which means "mildly flammable." This understandably raises eyebrows, but the practical risk is very low. ASHRAE Standard 34 classifies A2L refrigerants as having a low burning velocity, meaning they are difficult to ignite and flames do not propagate easily.[5]

For a residential context, the concentration of R-454B that would need to accumulate in a room before it could ignite is far above what would occur even in a catastrophic leak scenario. Modern R-454B systems include leak detection sensors as an additional safety layer. Updated building codes and installation standards (CSA C22.1, ULC, and CSA 6.26) account for A2L refrigerant requirements.

Residential propane stoves, natural gas furnaces, and gas water heaters all involve substances that are significantly more flammable than R-454B. The risk profile of A2L refrigerants in residential HVAC is well within the range that safety codes and standards have addressed.

What This Means for Your Current R-410A Equipment

If you currently have an R-410A air conditioner or heat pump, here is the practical situation:

Your System Still Works Fine

The phase-down does not affect the operation of existing equipment. Your R-410A system will continue working exactly as it always has. There is no regulation requiring you to replace it, and no deadline by which it must be removed.[1]

Servicing Will Continue

R-410A will remain available for servicing existing systems for the foreseeable future. Even as production quotas drop, reclaimed and recycled R-410A will supplement new production. Technicians will continue to be trained and certified to work on R-410A systems.

Refrigerant Costs Will Rise

This is the real impact. As R-410A becomes scarcer, its price increases. A typical AC service call that includes a refrigerant top-up might cost $150-$300 today for a minor leak. By 2028-2030, that same service could cost $250-$500 or more as R-410A prices rise.

We saw this exact pattern with R-22 (Freon). When R-22 was being phased out, its price went from roughly $10 per pound to over $50 per pound in the final years. R-410A is following a similar trajectory, though at a slower pace because the phase-down schedule is more gradual.

Repair vs Replace: A Decision Framework

The R-410A phase-down adds a new variable to the classic repair vs replace decision. Here is a framework for Ontario homeowners:

Keep and Repair If:

• Your R-410A system is under 10 years old
• The repair is minor (capacitor, contactor, fan motor) and under $500
• The system has no refrigerant leaks
• The system still meets your heating and cooling needs

Consider Replacing If:

• Your R-410A system is 12-15+ years old
• The repair involves the compressor ($2,000-$4,000) or a major refrigerant leak
• You are facing a second or third significant repair within a few years
• Your energy bills have been climbing due to declining efficiency
• You want to take advantage of current rebate programs for high-efficiency heat pumps[3]

The Cost Comparison

Here is a practical example. Suppose your 13-year-old R-410A AC needs a compressor replacement:

The repair looks cheaper in the short term, but the annual cost over the remaining life of the unit is often higher than replacing. And the replacement gives you a new warranty, higher efficiency, and a refrigerant with a long future ahead of it.

Impact on New Equipment Prices

The transition to R-454B has modestly increased the cost of new HVAC equipment. Manufacturers have redesigned compressors, updated safety components (leak sensors, updated electrical classifications), and retooled production lines. The current premium for R-454B equipment over the last generation of R-410A units is approximately:[4]

• Central air conditioner: $300-$500 premium
• Air-source heat pump: $400-$800 premium
• Mini-split system: $200-$400 premium per zone

These premiums are expected to shrink over the next two to three years as R-454B becomes the default and manufacturing scales up. By 2028-2029, R-454B equipment will likely be priced comparably to what R-410A equipment cost at peak production.

What About R-32?

You may also hear about R-32, another lower-GWP refrigerant (GWP of 675) that is popular in Asia and parts of Europe. Some manufacturers, particularly Daikin, use R-32 in certain product lines available in Canada.

R-32 is also classified as A2L (mildly flammable) and offers good efficiency. However, the North American HVAC industry has largely standardized on R-454B for residential applications. Both are viable options, and your choice of refrigerant will largely be determined by which manufacturer and model you select.[5]

Practical Advice for Ontario Homeowners

If Your System Is Less Than 8 Years Old

Do nothing different. Maintain your system as usual. You likely have 7-12 more years of service life, and R-410A will be available for servicing throughout that period. When it is time to replace, R-454B equipment will be mature, well-priced, and widely available.

If Your System Is 8-12 Years Old

Start planning for replacement within the next 3-5 years. You do not need to rush, but begin budgeting and researching your options. If a major repair comes up (compressor failure, significant leak), compare the repair cost against replacement rather than automatically fixing the old unit.

If Your System Is 12+ Years Old

This is the sweet spot for proactive replacement. Your system is approaching or past its typical design life. Replacing now with an R-454B system gives you a new warranty, higher efficiency, current rebate eligibility, and a refrigerant with a long supply horizon ahead of it.[3]

If You Are Building or Renovating

Specify R-454B equipment. There is no reason to install new R-410A systems in 2026. The cost difference is minimal, and you avoid starting a new installation with a refrigerant that is already on the phase-down path.

Frequently Asked Questions