R12 alternatives

["Obie Fayth" <bibendum59@domain.elided>]

    The freon in my 164 seems to be getting a little low and so instead of 
just having the leak fixed and topping the system up I have started thinking 
about using an alternative refrigerant. Does anyone on the list have 
experience with any of the alternative refridgerants available (Duracool 12a 
or ES12a for ex.)? I want something with good cooling properties that isn't 
particularly hazardous and which doesn't require replacement of existing 
components. Both of these sites products sound good, but I was wondering if 
someone with firsthand experience could offer any advice on the matter.

http://www.duracoolky.com/index.html
http://www.autocool-refrigerants.com/

-Obie
Tacoma, Wa.
164S - hot, hot, hot.

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