I'm no AC expert, and R134a is known for leaking much more easily than the
old R12 ...due to smaller molecules.

there are also other juices..
often with propane in them, that are supposed to cool pretty well.
'super-cool'  or whatever aftermarket sounding hotshot name I'm trying to
remember.
Dura-cool,
that's one I think.

( environmentally ..........R134a is currently  being phased out on very new
euro cars I believe. )

----- Original Message -----
From: "Karl Wolz" <wolzphoto@Q.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, June 30, 2011 12:42 PM
Subject: Desert refrigerant of choice?

> Any opinions on the R-12 refrigerant of choice for use in hot climates?
> Looked on Google and found a half dozen or so.  R134a is an option, but I
> get bad reports on its ability to cool from over 110 degrees.
>
> Karl Wolz