R-454B Refrigerant: A 2026 Guide

As EPA refrigerant regulations reshape the HVAC industry, understanding how traditional refrigerants are being phased out is essential for anyone who owns or services an HVAC system. R-454B refrigerant is emerging as a leading alternative to previous refrigerants, offering low toxicity, improved energy efficiency, and reliable performance in modern heat pumps that cool and warm air.

Use this R-454B refrigerant 2026 guide to learn what’s changing, why alternative refrigerants matter, and how to prepare for new equipment requirements. There is currently no EPA end date for servicing residential R-410A systems, but manufacturers are moving toward replacements designed to meet long-term environmental and performance standards.

This HVAC refrigerants guide will help you make an informed and safe choice. If your current system is still operating efficiently, there's no immediate requirement to replace it.

What Is R-454B Refrigerant and Why Does It Matter?

R-454B refrigerant is a new type of A2L refrigerant. A2L-based systems will replace R-410A systems in air conditioning and heat pump systems. A2L refrigerants have a lower global warming potential (GWP) while also meeting the new EPA refrigerant regulations that are underway. You get an environmentally responsible refrigerant that still delivers strong performance and efficiency.

R-454B is significant in 2026 because it represents the largest refrigerant transition in the HVAC industry since R-410A replaced R-22, otherwise known as Freon. The refrigerant transition timeline includes deadlines for manufacturing, installation, and service of the old types of refrigerant. By preparing now, small HVAC manufacturers and business owners can avoid costly delays and last-minute shortages. It also means staying ahead of regulatory penalties.

What Are the Key Properties and Specifications of R-454B?

The big difference with R-454B is that it clocks in with a lower GWP. It’s about 78% less than R-410A. That being said, it also comes with the A2L refrigerant safety classification, which means it’s slightly flammable. Even still, it has comparable efficiency to R-410A for performance. But the two aren’t interchangeable. You cannot charge an R-410A system with R-454B, and you cannot charge an R-454B system with R-410A. This would not only be a safety hazard but would also invalidate the warranty.

How Does R-454B Compare to R-410A in Performance and Environmental Impact?

When looking at R-454B vs R-410A, their performance is similar. You get about the same cooling efficiency, but the environmental impact is dramatically lower. R-410A has a GWP of around 2,088. R-454B has a GWP of approximately 466. That’s around 75% lower! It also qualifies it as a “low GWP refrigerant.” This rating means it is compliant with Environmental Protection Agency refrigerant regulations.

What EPA Regulations Drive the 2025 R-454B Transition?

The AIM Act requires a phase-down of R-410A. Alongside the AIM Act, there is also a Technology Transition (TT) that is guiding the phase-down and future replacements. The equipment manufacturers, like Trane and Carrier, have already shifted to producing A2L-compliant equipment and parts. Every new system built after 2025 must comply with these EPA guidelines.

What Are the Critical 2025 Compliance Dates for R-454B?

The primary change for manufacturers happened on January 1, 2025. This was when new residential and light commercial equipment had to use compliant refrigerants with a low GWP. From there, state-level rules may have other restrictions. For now, existing R-410A systems can still be serviced as usual. This will be the case until the refrigerant availability dries up.

When Do Manufacturing and Installation Deadlines Take Effect?

For manufacturers like Trane or Carrier, the EPA requires newly manufactured residential and light commercial HVAC systems to transition to using low-GWP refrigerants starting January 1, 2025. After that date, manufacturers cannot produce new HVAC systems using R-410A. 

For installation, contractors can repair and replace existing R-410A equipment. The EPA has not determined a date by which R-410A systems can no longer be serviced. Local regulations always apply, but there is currently no end date for servicing legacy systems of R-410a or R-22.

What Types of Equipment Have Different Compliance Timelines?

Currently, commercial units have until 2028 to make the conversion, if R-410A units are still available.  Other segments of the market have staged compliance dates.  Check the EPA FAQ regarding the AIM Act and Technology Transition (TT) compliance dates.

How Do State Regulations Potentially Accelerate These Deadlines?

Some states, like California, have their own climate policies in addition to Federal regulations. That’s why contractors working across multiple states need to track both federal and state rules to avoid penalties and stay in the clear.

What Safety Requirements Apply to R-454B (A2L) Refrigerants?

Because R-454B refrigerant is classified as A2L, it’s important to follow A2L refrigerant safety rules. This means that leak detection systems are required in some installations. HVAC technicians must also follow specific handling and charging procedures. With that comes new training and certification, too. 

What Does A2L Classification Mean for Installation and Service?

As an A2L refrigerant, R-454B is mildly flammable, so it comes with its own installation standards and safety practices. This classification impacts how systems are designed as well as how the refrigerant is stored and serviced.

When Are Refrigerant Detection Systems (RDS) Required?

Refrigerant detection systems (RDS) may be required in certain occupied spaces. These would be areas where leaks could pose risks. It’s important to reference the building codes. These often state whether RDS is necessary for R-454B equipment.

What Training and Certification Requirements Apply to Technicians?

HVAC technicians must be trained in A2L refrigerant safety. Along with that, they must be certified to handle R-454B refrigerant correctly. This includes updated procedures for charging, recovery, and leak detection.

How Does R-454B Equipment Differ From R-410A Systems?

R-454B equipment is built to handle different pressures and safety standards than R-410A equipment. They require redesigned compressors, coils, and controls from manufacturers. Refrigerant detection systems for leaks are required in many systems as well.  Consequently, retrofitting existing R-410A systems to mimic R-454B systems is not recommended because of the pressure and oil differences.

What Design Changes Are Required for R-454B Compatibility?

R-454B equipment often uses new types of compressors, coils, and controls that work with different pressures and safety requirements. These design changes are necessary for both performance and compliance.

Can You Retrofit Existing R-410A Systems To Use R-454B?

No. Retrofitting R-410A systems for R-454B refrigerant is not recommended. There are oil and pressure differences with unique parts that can get complicated to swap out. For long-term reliability, new R-454B-compatible equipment is the only real option.

What Installation and Service Procedures Are Different?

Technicians must follow updated charging limits and leak prevention steps when working with R-454B. There are also ventilation requirements to consider. That’s why the correct tools and proper handling methods are critical for safe R-454B installation.

What Are the Cost Implications of the R-454B Transition?

During the early rollout of new R-454B equipment, prices may rise. However, if you know where to shop, you can find affordable heating and cooling systems. That’s why people turn to Surplus City. We have helped contractors navigate changing industry regulations for over 50 years, and our new EnduroAir systems are designed specifically for R-454B. Once the new systems are installed, operating costs are expected to remain about the same or even improve with the good efficiency levels of low GWP refrigerant.

As the supply of R-410A refrigerant and parts declines, service costs are expected to rise. But again, that just depends on where you shop. HVAC contractors and property managers can offset costs by getting their R-454B equipment and replacement R-410A parts from trusted surplus HVAC equipment companies.

How Will Equipment Prices Change During the Transition?

Price is impacted by many elements, including the cost of the materials, tariffs, and others. There are higher engineering costs in the new A2L class of products, so initially, SRP may be above legacy equipment. However, over time, that pricing is expected to drop as the supply of new equipment expands.

What Are the Long-Term Operating Cost Differences?

R-454B equipment may deliver reduced energy costs because of its high efficiency rating. We’ll also see long-term savings from avoiding other future regulatory restrictions.

How Can Surplus Equipment Reduce Transition Costs?

Buying surplus HVAC equipment allows contractors to save on the upfront investment while still meeting the refrigerant transition 2025 requirements. Purchasing from Surplus City also means you can avoid delays on backorders since everything is in stock and ready to ship.

How Do You Select the Right R-454B Equipment?

Manufacturer reputation and warranty coverage are crucial when selecting new HVAC equipment. Fortunately, today’s leading manufacturers are rolling out new product lines with R-454B refrigerant and creating a wide range of options throughout 2026 and beyond.

What Equipment Specifications Should You Prioritize?

When comparing different systems, it’s important to prioritize R-454B compatibility and efficiency ratings. Warranty coverage also plays a role. All of these factors are critical for compliance and long-term performance.

Which Manufacturers Are Leading the R-454B Transition?

Major brands like Trane, Carrier, and Lennox are already releasing R-454B refrigerant product lines. It’s well known that working with trusted manufacturers delivers better reliability. That’s why Surplus City is proud to partner with Carrier to produce EnduroAir.

What Quality and Warranty Considerations Apply?

Buyers should always confirm that their new systems will come with full manufacturer warranties. Protection with warranties is especially useful during these quick changes in the industry. The equipment also needs to comply with EPA refrigerant regulations.

What Installation and Safety Best Practices Apply to R-454B?

Training staff on safe handling and charging methods goes hand in hand with using proper storage and following leak detection procedures. It’s also a good idea to have an emergency response protocol for the A2L’s mild flammability. Then everyone can stay safe on the job.

What Code Requirements Govern R-454B System Installation?

Local and national building codes state how A2L refrigerant systems need to be installed. Contractors should review these updated code requirements before beginning any R-454B installation to make sure they’re in the clear.

How Do You Properly Handle and Store R-454B Refrigerant?

R-454B refrigerant must be stored in designated containers and kept away from ignition sources. The handling also requires specialized recovery equipment that’s uniquely designed for A2L refrigerants.

What Emergency and Leak Response Procedures Are Required?

Because R-454B is mildly flammable, technicians need leak detection tools. Clear evacuation and repair procedures are also necessary. Following A2L refrigerant safety protocols means workers and occupants will stay protected.

How Do You Plan for Successful R-454B Implementation?

Planning now ensures a smooth transition. Scheduling technician training should be one of the first steps. From there, it’s good to review the installation timelines and help customers think through the pros and cons of upgrading their system vs maintaining equipment that uses R-410A. Along the way, exploring surplus HVAC equipment can help minimize costs.

What Training and Preparation Steps Are Essential?

Contractors should schedule technician certification courses first and foremost. They also need to invest in compatible tools and review R-454B refrigerant 2026 guides and future materials that become available. Preparation now helps you avoid compliance issues later on.

How Should You Time Equipment Purchases and Installations?

Consider buying R-454B equipment early to stay ahead of the curve. For busy workloads, this level of planning avoids delays caused by the supply chain. When you have a reliable supplier like Surplus City, you should be all set!

What Resources Help Ensure Compliance and Safety?

You can find detailed information on R-454B installation from the EPA guidelines for compatibility, manufacturer training, and industry associations. HVAC contractors should reference these regularly to stay on top of their game.

Where Can You Find Quality R-454B Equipment at Competitive Prices?

Surplus City provides cost-effective options during the refrigerant transition. Buying R-454B equipment through surplus options means you get compliance while reducing upfront costs. Surplus City specializes in offering warranty-backed units that help contractors and homeowners navigate the refrigerant transition 2026 with confidence.

How Does Surplus Equipment Provide Value During Industry Transitions?

Surplus HVAC equipment offers immediate cost savings. We also provide availability during high-demand times. It’s a smart option for contractors balancing compliance concerns with their budget.

What Advantages Does Surplus City Offer for R-454B Equipment Buyers?

Surplus City provides verified, warranty-backed R-454B equipment at competitive prices. EnduroAir is our latest venture into the manufacturing side of the industry, and our inventory helps buyers stay compliant without overspending during the refrigerant transition in 2026.

How Do You Ensure Equipment Quality and Compliance When Buying Surplus?

It’s important to always confirm manufacturer details, warranty terms, and R-454B compatibility when purchasing surplus systems. Working with reputable suppliers like Surplus City means you get both quality and compliance. We’re here to help you save and get high-quality equipment every day! Starting shopping today!