well today we learned in school....R414b work AS WELL as r-12 but requires NO changes. no new selas o-rings... just evacuate the system and install 414B. new stuff without the ozone damage!
more info on r414b?? have not heard of it yet. Is it getting put onto new cars?? What is the primary differences between it and 134?
I was told the r414b is commercial grade refrigerant, used mainly for commercial freezers etc. Not for automotive applications.