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redpoint5 · 06-05-2019, 05:39 PM

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?

06-05-2019, 05:39 PM	#62 (permalink)
redpoint5 Human Environmentalist Join Date: Aug 2010 Location: Oregon Posts: 12,754 Acura TSX - '06 Acura TSX 90 day: 24.19 mpg (US) Lafawnda - CBR600 - '01 Honda CBR600 F4i 90 day: 47.32 mpg (US) Big Yeller - Dodge/Cummins - '98 Dodge Ram 2500 base 90 day: 21.82 mpg (US) Chevy ZR-2 - '03 Chevrolet S10 ZR2 90 day: 17.14 mpg (US) Model Y - '24 Tesla Y LR AWD Pacifica Hybrid - '21 Chrysler Pacifica Hybrid 90 day: 57.45 mpg (US) Thanks: 4,316 Thanked 4,472 Times in 3,437 Posts	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? __________________ Gas and Electric Vehicle Cost of Ownership Calculator Give me absolute safety, or give me death!