>>My system is brand new and totally open and vented at this point.  I am
>>not going
>>to use Freon.  I will use a propane/butane mixture which is totally legal and
>>more effecient that R12 or R134A
>
>Maybe more efficent, but not legal for automotive use!  (The EPA doesn't
>allow anything flamable for an automotive freon substitute)  Spend the $25
>to get certified ( http://www.epatest.com ) and then use the right stuff!
>
>Bill

Hear hear!!!

The certification test is NOT HARD at all. And, once you're certified,
you'll be able to buy R-12. At the present prices, I wouldn't recommend
that though.

Joshua Van Tol -- jjvantol@lear.csp.ee.memphis.edu