NATE Low-GWP Practice Questions - NATE Low-GWP Refrigerants Certification Exam

R-410A, the legacy refrigerant being replaced in residential air conditioning, carries which ASHRAE 34 safety classification?

A1 (non-flammable) A2L (mildly flammable) A3 (highly flammable) B2 (toxic, flammable)

A1 (non-flammable)

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