A2L Fact Sheet
A guide to Why A2L from Mitsubishi Electric
In June 2021, the EPA approved A2L refrigerants for use in residential A/C applications and the phase out of A1 refrigerants. Popular refrigerant options include the commonly known R-32 and R-454B.
What is A2L?
A = Non-toxic
2 = Flammable
L = Low Burning Velocity
You need 1,000 times more energy to ignite A2L than to ignite propane, and A2L will self-extinguish.
• UL60335-2-40 implemented strict safety requirements for the design of systems with A2L refrigerants.
• All building codes have been updated for guidance on installing systems.
• AHRI has formed a task force to ensure industry training takes place.
