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

Which two A2L refrigerants are the primary replacements for R-410A in new U.S. residential split-system air conditioners and heat pumps?

R-22 and R-134a R-32 and R-454B R-290 and R-600a R-407C and R-404A

R-32 and R-454B

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