Debunking the Myths About A2L Refrigerants: What Homeowners (and Technicians) Need to Know
As the HVAC industry continues to evolve toward more environmentally friendly technologies, A2L refrigerants have become the next big step. These new refrigerants—like R-454B—offer lower global warming potential (GWP) and help meet new environmental standards.
But with change comes confusion. Homeowners are hearing mixed messages, and even some technicians have questions. Let’s clear the air and debunk the most common myths about A2L refrigerants
Myth #1: “A2L refrigerants are dangerous because they’re flammable.”
Reality:
Yes, A2L refrigerants are classified as mildly flammable, but that doesn’t mean they’re dangerous when handled correctly. In fact, they’re designed to burn very slowly and require specific conditions to ignite—conditions that are extremely unlikely in normal HVAC operation.
Manufacturers and safety organizations have spent years developing new safety standards (UL 60335-2-40, ASHRAE 15-2022) and installation practices to ensure these systems are safe for both technicians and homeowners.
Think of it this way: gasoline is highly flammable, yet we handle it safely every day because of established safety protocols. A2L refrigerants are no different.
Myth #2: “A2Ls don’t cool as well as R-410A.”
Reality:
Performance is nearly identical—and in some cases, A2Ls like R-32 are more efficient than R-410A. Systems designed for A2L refrigerants often achieve:
- Higher energy efficiency (SEER2 and EER ratings)
- Lower compressor discharge temperatures
- Reduced refrigerant charge requirements
That means homeowners can expect the same comfort levels with lower energy use and a smaller carbon footprint
Myth #3: “You can just drop in an A2L refrigerant into an R-410A system.”
Reality:
No, A2L refrigerants are not drop-in replacements.
They operate at similar pressures, but the components, controls, and safety mechanisms in A2L systems are engineered specifically for these refrigerants.
To comply with code and maintain safety, technicians must install equipment designed for A2L refrigerants—including leak detectors, ventilation requirements, and updated labeling.
Myth #4: “A2Ls will be a nightmare for HVAC technicians.”
Reality:
Technicians will need updated training and tools, but the learning curve is manageable.
Organizations like AHRI, ESCO, and ACCA are already offering comprehensive A2L training programs that cover:
- Safe handling and charging procedures
- Leak detection and recovery
- Proper ventilation and equipment placement
Most HVAC pros will find that once trained, working with A2Ls isn’t much different from R-410A—just with a few added precautions.
Myth #5: “This refrigerant change is just another unnecessary regulation.”
Reality:
The phaseout of high-GWP refrigerants like R-410A isn’t arbitrary—it’s part of a global effort to reduce greenhouse gas emissions under the American Innovation and Manufacturing (AIM) Act.
By transitioning to A2L refrigerants, HVAC manufacturers and contractors are helping to:
- Meet federal and state environmental goals
- Improve system efficiency
- Ensure long-term equipment availability and serviceability
This change positions the industry—and consumers—for a more sustainable, future-ready HVAC landscape.
The Bottom Line
Change can be intimidating, but A2L refrigerants represent progress, not problems.
They’re safe, efficient, and environmentally responsible when used as intended.
At Darnold & Lyons Heating and Cooling, our technicians are fully trained and certified to work with the latest A2L refrigerant systems. Whether you’re replacing an older R-410A unit or planning ahead for future upgrades, we’re here to ensure a smooth, safe transition.
