No you don't. He left the game just around the time R134a was starting to come in so he's not up to speed with the latest refrigerants.Matt88S said:We need cdaly's opinion, he used to be in the transport refrigeration field and knows a lot about A/C systems and refrigerants.
All I can tell you about flamability is that R12 is not flamable but does produce a pretty damaging "phosgene"(?) gas when exposed to flame. Its non-flamability is the main thing that made it suitable for transport refrig / motor AC given the increased risk of leakage due either to accidents or vibration fatigue.
I don't know how R12 compares with other industrial refrigerants as far as cooling capacity is concerned. There are probably better capacity (inflamable) gasses in use there...