Refrigerant R-410A is commonly classified in ASHRAE 34 (designation at time of this bank) in which flammability and toxicity class pair?
Choices
- (A) A3 / high flammability
- (B) A1 / lower flammability (essentially no flame propagation at 60°C in ASHRAE 34 test context)
- (C) B1 only
- (D) A2L at all historical dates
Correct answer: (B)
A1 / lower flammability (essentially no flame propagation at 60°C in ASHRAE 34 test context)
Explanation
R-410A: historically A1 (verify current ASHRAE 34/EPA listings for the edition you adopt).