Freon is a brand name, like Sunoco, or Sue Bee Honey. The fact that it's
been improperly used for decades doesn't change that fact.
That said, refrigerant 134a has a whole different pressure, temperature
relationship. And different heat carrying capacity. If it works at all, in a
R-22 system, it won't work well.
Of course, I do need to note, that's a federal crime to do so, under EPA
Christopher A. Young
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Has anyone tried using the freon that you buy for a car AC system in a
home centralized AC system?
Are there any reliable discussions about this topic on the web. I see
some, but don't know who to believe.