EDITOR’S NOTE: The Air-Conditioning, Heating, and Refrigeration Institute has issued a white paper titled “Reports of R-134a Contaminated with R-40 and Other Refrigerants.” That paper follows.

EDITOR’S NOTE: One issue concerning counterfeit refrigerants is the possibility of contamination in such systems. A major report on this has been published by the AHRI under the title: “Reports of ...