Quote:
Originally Posted by redpoint5
I've heard it said before that R12 was a more efficient refrigerant than R134a, but was eliminated due to the ozone depleting CFCs. As far as I was able to research, efficiency is measured as COP (coefficient of performance), and R134a has a higher COP (better).
Anyone know which is more efficient? If R134a is more efficient, why was R12 ever used in the first place?
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R12 works with simple mineral oil. IIRC R134a requires synthetic POE oil (which can replace mineral oil in R12 systems, too)... so I'd guess it was a problem of first practically usable discovery.