i ran into a shop in Florida, Broward County, that uses Freeze 12...

>From: Kim Brennan <kimbrennan@MAC.COM>

>
>R12 is a "banned" substance now. I.E. you are supposed to stop using it
>(older cars using it are grandfathered, but new cars can't use it.)
>
>R134a is the replacement for R12. Different formula of gases. Not as
>effective in cooling, but if different evaporators are used, it can
>still be pretty effective.
>
>Freeze 12, Duracool and other similar products are yet another
>formulation of gases. Mostly based around propane and butane. However,
>don't make the mistake that these are less or more flammable than other
>freons. Given sufficient opportunity any of them can be made to burn.
>
>I've got Duracool in my GoldBrick. Works quite nicely. The major issues
>are, that you must be careful to not let it get mixed with 134a (i.e.
>if another shop services your vehicle they must know about it.) This is
> >NOT< due to the flammability issue, but rather due to the PRESSURE
>issue. Duracool and Freeze 12 can create much HIGHER pressures than
>134a, and those higher pressures can damage equipment used for
>recharging systems.
>
>Duracool or Freeze 12 having cooling properties similar to the original
>R12 used in your Vanagon, and hence I feel are better choices. However,
>few US shops use Duracool or Freeze 12 themselves (though it is legal
>in many jurisdictions.) It is legal for use in Europe and Mexico I
>believe.
>
>
>On Wednesday, May 14, 2003, at 11:27  AM, John Rodgers wrote:
>
>>What are the
>>differences between R12, Freeze 12, and the 134a??

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