EPA 608 Core · Safety · Medium
Under ASHRAE Standard 34, what does an A2L refrigerant classification indicate?
Answer: B. Lower toxicity and mild flammability (low burning velocity)
- AHigh toxicity and high flammability
- BLower toxicity and mild flammability (low burning velocity)✓ Correct
- CLower flammability and high global warming potential
- DNon-flammable but highly toxic
Why B is right
In ASHRAE 34, 'A' stands for lower toxicity, and '2L' indicates mild flammability with a low burning velocity. These refrigerants require specific safety and ventilation protocols compared to A1 (non-flammable) refrigerants.
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Go deeper with the study guide A2L Refrigerants and the R-410A Transition: A Tech’s Guide, try the free 10-question test or browse all EPA 608 practice questions.
A practice question written for study, checked against 40 CFR Part 82, Subpart F. It is not an official EPA exam question, and this site is not affiliated with the U.S. EPA.