> I came across a product called ProDry billed as a replacement for
> R12 freon
> in older a/c systems.
>
> As I have an R12 based a/c system in a vehicle worth less than conversion
> cost to R134 that needs recharging I am quite interested.
I've never even heard of the stuff, that I remember, but the maker's ads
sure seem over-hyped. 134A causes "instant testicular cancer" on contact
??? C'mon guys !
http://www.energyforever.net/envirosafe.htm
Hype aside, there doesn't seem to be any reason it's better than the old
propane/butane mixture that an old friend of mine came up with. ProDry is a
hydrocarbon, which means that it will burn. (Of course, so will R134A, and
so will R12 when mixed with refrigerant oil and sprayed through a small
orifice). Given the rather dramatic price differential, I still plan to try
the propane/butane mix first.
http://www.vettenet.org/acfaq.txt
BTW, Butane-N is apparently becoming fairly rare in camping stores, but I
was able to mail order some from Athena
http://www.athenabrands.com
Randall
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