As we approach 2025, significant changes are on the horizon for the HVAC industry due to the American Innovation and Manufacturing (AIM) Act. This landmark legislation, enacted in 2020, sets forth a 15-year phase down of hydrofluorocarbons (HFCs) like R-410A, which will no longer be used in new air conditioning systems come 2025. But don’t worry—while this might sound daunting, the transition is manageable and brings exciting new developments around AC repair in Alexandria, VA.
What’s Changing?
Starting in 2025, the EPA (Environmental Protection Agency) will set a limit on how much global warming potential (GWP) refrigerants can have. R-410A, which has a high GWP of 2,088, will no longer be used in new air conditioners. Instead, we’ll use new refrigerants with lower GWP, known as A2L refrigerants.
What Are A2L Refrigerants?
A2L refrigerants are a class of refrigerants with a lower flammability rating compared to older types. They include single refrigerants or blends and are considered the second safest class of refrigerants after A1 refrigerants. Unlike their more flammable counterparts, such as propane or ammonia, A2Ls are designed to be less hazardous. They have a lower flammability risk due to their:
- Higher Lower Flammability Limit (LFL): They need to reach a higher concentration in the air to ignite.
- Higher Minimum Ignition Energy (MIE): They require more energy to ignite.
- Lower Heat of Combustion (HOC): They release less energy when burned.
- Lower Burning Velocity (VC): If ignited, the flame spreads slowly.
A2L Refrigerants in HVAC Systems
A2L refrigerants, such as R-454B and R-32, have been used in small HVAC appliances and international systems for years. They’re now set to become standard in new comfort cooling systems.
FAQs About A2L Refrigerants
1. Are A2L Refrigerants Likely to Cause a Fire?
Despite being classified as mildly flammable, A2L refrigerants are hard to ignite. Tests show that everyday heat sources like cigarettes and lighters won’t light them. They are much less flammable than A3 refrigerants because they need a higher concentration to ignite, require more energy to start burning, release less heat if they do catch fire, and burn more slowly.
2. If There’s a Leak, Do I Need to Replace the Entire Charge?
No, you don’t. R-454B, an A2L refrigerant, has a low glide (1.4°F), which means it can be topped off without needing to recover the entire refrigerant charge if a leak occurs.
3. Do I Need Additional EPA Certification to Work with A2Ls?
No additional EPA certification is required. Contractors and technicians who already hold an EPA Section 608 certification are grandfathered in and do not need to take another exam.
4. Will I Need to Buy All New Tools for A2L Refrigerants?
Many current tools are compatible with A2L refrigerants. Some tools you already use might be A2L-approved. Check with your tool manufacturer to confirm if your tools are approved for use with A2Ls.
5. Can A2L Refrigerants Be Added to Systems Designed for A1 Refrigerants?
A2L refrigerants must only be used in equipment specifically designed for them. They cannot be used in existing A1 systems, as this could lead to system inefficiency or safety issues.
Preparing for the Change
As we move closer to 2025, it’s important to stay informed about these refrigerant changes. Homeowners and businesses should understand the shift to A2L refrigerants can help ensure your HVAC systems are ready and compliant. To manage this transition smoothly, regular maintenance and professional service will be crucial.
At McDaniel Service, Inc., we’re committed to helping you navigate these changes with ease. Whether it’s a question about the new refrigerants or a routine check-up on your HVAC system, our expert technicians are here to provide you with the finest quality service.
Contact McDaniel Service, Inc. today for AC repair in Alexandria, VA. Service is our middle name!