ac evaporator

Pete in NH said
, R-134A is less efficient that the old R-12 .

This is a simple concept that many don't understand. R-12 is also more efficient than R22, used for decades in AC units.

I don't remember anymore but I believe AMMONIA trumps them all. YEAH!!! Let's do THAT!!! Let's use AMMONIA in our car systems LMAO