A2L Refrigerant Transition Resource Guide
Welcome to our A2L Refrigerant Transition Resource Guide. Here, we'll keep you informed on the latest information regarding the transition to A2L refrigerants.
Manufacturers will no longer produce matched systems with 410A refrigerant after January 1st, 2025. There are no guarantees or timelines on how long the existing equipment will remain available.
Update as of 6/4/26
The EPA is finalizing (4) major changes that affect the HVACR industry.
1. The installation deadline for 410a split systems is being repealed. This simply means that R-410A equipment that was manufactured or imported prior to January 1, 2025 can continue to be sold and installed.
2. Delay the GWP compliance date for Supermarket refrigeration. This allows for the use of refrigerant 449a/448a in existing equipment (see chart below).
3. Delay the GWP compliance date for commercial refrigeration applications (remote condensing units). This will allow for equipment to use refrigerants 449a / 448a (see chart below).
4. Delay the GWP compliance date for cold storage warehouse refrigeration. Based on the GWP compliance, this would allow for the use of the newer A2L’s and CO2 but not 449a / 448a (see chart below).
It is important to note that none of these changes will apply to NYS as part 494 regulations, which are more stringent, will take precedence.
While these changes provide additional flexibility for existing systems, there is some concern within the industry regarding their long-term impact on refrigerant supply. The AIM Act continues to phase down high-GWP refrigerants, reducing their availability over time. The delay introduced by the EPA rule may prolong reliance on these higher-GWP refrigerants, potentially straining an already limited supply needed to service existing systems.
Meier Supply remains committed to designing and delivering low-GWP refrigeration solutions. We strongly encourage all industry partners, including our contractor customers, to adopt refrigerant reclamation practices and transition toward low-GWP system designs. We will continue to support our customers with responsible, long-term, environmentally sustainable solutions.
New Era of Low GWP Refrigerants
The American Innovation & Manufacturing (AIM) Act directs the U.S. Environmental Protection Agency (EPA) to implement a phasedown of the production and consumption of HFCs by 2035. As part of this work, the EPA has published a rule that beginning January 1, 2026, the U.S. Federal Government will require Residential HVAC equipment to use refrigerants with a Global Warming Potential (GWP) of less than 700.
A2L Defined
ASHRAE 34 defines refrigerant classification. The first digit refers to toxicity. A is lower toxicity, and B is higher toxicity. The numbers 1, 2L, 2, and 3 refer to flammability. The lower the number, the lower the flammability. 2L is the lowest flammability classification. Refrigerants with this classification are difficult to ignite and non-explosive.
Benefits of the Refrigerant Change
- Environmental Impact: A2L Refrigerants have a lower Global Warming Potential compared to traditional Hydrofluorocarbons (HFCs) such as R-410A. This means their potential to contribute to global warming is significantly lower if released into the atmosphere.
- Energy Efficiency: A2L Refrigerants often have better thermodynamic properties, which can lead to improved energy efficiency in cooling systems.
A2L Compatible Tools
Meier Supply is fully stocked with the essential A2L compatible tools from Fieldpiece and JB Industries, which will allow you a smooth transition through this regulated refrigerant change. For a full list of A2L compatible tools, check out our ‘Must Have Tech Tools’ product page.
Education
Meier Supply offers a range of training programs designed to enhance the skills and knowledge of HVACR industry professionals. Our training covers various topics, including the latest refrigerants and system technology advancements. We are excited to announce our upcoming A2L refrigerant classes, which will provide in-depth information on handling, safety, and efficiency related to A2L refrigerants. These classes aim to equip participants with the necessary skills to work effectively with these new refrigerants, ensuring compliance with current standards and enhancing overall system performance.
Refrigeration
The shift to A2L refrigerants on the refrigeration side, as detailed by Heatcraft, marks a significant change in industry standards. A2L refrigerants, which include options like R-454A, R-454C & R-455A, are characterized by their lower Global Warming Potential (GWP) compared to traditional refrigerants. This change aims to address environmental concerns while maintaining efficient cooling performance.
For contractors, this transition involves several key actions. Firstly, it's crucial to familiarize yourself with the new refrigerants' properties, including their lower flammability risks and handling requirements. This involves adopting new safety protocols and ensuring proper training for handling these substances. Meier Supply offers A2L essentials training to equip contractors with the knowledge needed to manage these refrigerants effectively. This training covers essential safety practices, system adjustments, and regulatory compliance, ensuring that contractors can adapt seamlessly to the new standards while upholding safety and efficiency in their operations.
Checklist
Meier Supply worked diligently to put together an overview of the items that contractors should be educated on and the proper steps to take during the refrigerant transition. Please take a moment to download and review the checklist. If you have any questions, feel free to text or call to speak to a sales representative.