TLDR

• Starting January 1, 2026, all new HVAC units must use low-GWP refrigerants with a global warming potential below 700, replacing R-410A as mandated by the EPA's AIM Act.
• This transition will lead to a significant retrofit wave involving line set upgrades, safety checks, and new leak detection tools, with system costs rising by around 10-15% and refrigerant prices increasing by 42%.
• The change also aligns with updated 2026 DOE efficiency standards, requiring higher energy performance for both split and packaged HVAC systems.

Starting January 1, 2026, the EPA will require all new HVAC systems to use low-GWP refrigerants. GWP means Global Warming Potential, and these new refrigerants release much less heat-trapping gas than the current standard, R-410A. This change affects HVAC contractors, technicians, and building managers everywhere. Existing systems will need retrofits to meet new safety and efficiency rules. The shift means higher equipment costs, special safety checks, and new tools for service work. If you work with or manage HVAC units, this upcoming deadline will reshape how you buy, install, and maintain cooling systems.

Next Steps for Contractors and Facility Managers

Starting in 2026, all new HVAC systems must use low-GWP refrigerants like R-32 or R-454B. These refrigerants are mildly flammable (called A2L class), so your retrofits will need line set upgrades to handle safety risks. That means replacing or modifying the copper tubing that connects outdoor and indoor units. You'll also have to verify ventilation is proper to prevent gas buildup if leaks occur.

Prepare to invest in new tools for leak detection, superheat, and subcooling measurement—these help fine-tune system performance with the new refrigerants. Expect refrigerant costs to jump by about 40% and total system costs to rise roughly 10-15%, so factor these into bids and budgets.

Check your existing stock and service plans now. While old equipment can still run, any new refrigerant charges must comply with the 2026 rules. Plan for staff training on handling A2L refrigerants safely. Align your retrofit projects with the new DOE efficiency standards (17 SEER2 for splits, 16 SEER2 for packaged units) to meet compliance and avoid costly fixes later. Start early to manage lead times and price increases.

Market Impact of the Low-GWP Refrigerant Transition

The upcoming switch to low-GWP refrigerants will reshape the HVAC market starting in 2026. Contractors and technicians must prepare for a surge in retrofits because existing R-410A systems will need upgrades to handle new refrigerants like R-32 or R-454B. These refrigerants are mildly flammable (called A2L), requiring safer equipment and installation methods. This means more work verifying ventilation, adjusting refrigerant charges, and updating tools for leak detection and temperature controls.

On the customer side, expect equipment costs to rise by about 10-15% due to the needed upgrades. Refrigerant prices are also going up, with some soaring over 40%. Combined, these factors have already doubled system prices since 2019. Facility managers and contractors will need to budget accordingly and plan for longer service times.

The good news is that these new refrigerants come with efficiency gains. They align with 2026 DOE standards, improving energy use and lowering operating costs. This shift will impact all markets, from residential to commercial, by driving both new installations and retrofit projects.

Technical Changes for Retrofits in 2026

Starting in 2026, HVAC systems that use R-410A refrigerant will need major updates because of new rules. New units must use refrigerants with a Global Warming Potential (GWP) below 700, like R-32 or R-454B, which are less harmful to the climate. These refrigerants are mildly flammable, so technicians will have to upgrade the line sets—the tubes that carry refrigerant—to safer materials and check ventilation carefully to prevent leaks and ensure safety.

Service work will also require new tools to measure refrigerant charge accurately, detect leaks faster, and check system performance on superheat and subcooling—terms that describe how the refrigerant is heating or cooling inside the system. These changes will increase costs: equipment prices may go up by 10-15%, and refrigerant prices could spike by 40% or more. Since 2019, total system prices have doubled partly due to these new requirements.

These technical updates also align with tougher efficiency rules from DOE taking effect in 2026. Split systems will need to meet 17 SEER2 and 12 EER2 ratings, meaning they use less energy during cooling. Packaged units will follow similar standards. These standards ensure new systems are both safer and more energy efficient.

Regulations Driving the Shift to Low-GWP Refrigerants

The phaseout of R-410A refrigerant is part of a new EPA rule under the AIM Act, linked to the global Kigali Amendment. Starting January 1, 2026, all new HVAC systems must use refrigerants with a Global Warming Potential (GWP) below 700. GWP measures how much heat a gas traps in the atmosphere compared to carbon dioxide; the lower the number, the better for the climate. Approved replacements include A2L-class refrigerants like R-32 and R-454B. A2L means "mildly flammable," so systems need special handling and safety checks. Although existing R-410A stockpiles won’t be banned, servicing older systems after 2026 will require using these new low-GWP refrigerants. This rule completes a long-term plan to reduce HFC gases by 85% in 15 years. It also pushes new equipment to meet higher efficiency standards set by the Department of Energy, such as 17 SEER2 (Seasonal Energy Efficiency Ratio) for split systems. These regulations mean HVAC professionals must adjust installation, servicing, and safety procedures to meet new refrigerant requirements.

Key Takeaways

• Starting January 1, 2026, all new HVAC units must use low-GWP refrigerants under 700, like R-32 or R-454B, replacing R-410A to meet EPA AIM Act rules.
• Systems using R-410A will need retrofits including line set upgrades and ventilation checks to safely handle mildly flammable A2L refrigerants.
• Expect equipment costs to rise 10-15% and refrigerant prices to jump by 42%, with total system prices doubling since 2019 due to these changes.
• The 2026 retrofit wave aligns with new DOE efficiency standards requiring higher SEER2 and EER2 ratings for split and packaged systems.

Frequently Asked Questions

What changes does the 2026 refrigerant phaseout require for R-410A HVAC systems?

Starting January 1, 2026, new HVAC units can no longer use R-410A refrigerant. Systems with R-410A will need retrofits, including upgraded line sets and ventilation checks to handle new low-GWP refrigerants that are mildly flammable.

Which refrigerants will replace R-410A after the phaseout?

The main replacements are low-GWP refrigerants like R-32 and R-454B. These have Global Warming Potentials under 700, meaning they are about 75% less harmful to the climate compared to R-410A.

How will the retrofit affect costs and equipment for contractors?

Retrofits will raise equipment costs by about 10-15%, with refrigerant prices jumping 40% or more. Contractors need to use special tools for leak detection and ensure safety compliance when working with the new refrigerants.

How does this phaseout relate to efficiency standards?

The refrigerant changes align with new 2026 DOE efficiency standards requiring higher SEER2 and EER2 ratings. This means new systems must be more energy efficient, benefiting both customers and the environment.

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