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Re: Is there such thing as an R-12 Substitute?
Posted to HVAC Forum on 5/20/2004

What JJ said except to add, Freeze "12" is 80% R-134a and 20% R-142b. Free Zone is 79% R-134a and 19% R-142b and 2% oil.

These blends cost more then R-134a so why not just go with R-134a if R-12 is unavailable or illegal or the customer is just plain to chea... Login to read more.