I'm certainly not up to date with the commercial world of refrigeration but I believe no R-12 or R-22 has been used in new units for many years. As a result of it's phaseout many years ago the cost has gone through the roof compared to the replacements so even though the FAQ says it can be used until the end of this year, I can't believe anyone would. R-22 was more efficient than R-12 and that's one of the reasons it was used in fixed AC units, refrigerators, and heat pumps. R-12 was primarily for automotive units. All those old refrigerants, including halons for fire suppression systems, supposedly depleted the ozone layer but I personally have problems believing all that is fed to us. It wasn't until recent times with the launch of UARS (Upper Atmosphere Research Satellite) that we could even monitor the ozone layer accurately so who knows if we're not just in a natural cycle and we won't know that until long after I'm gone. A lot of companies made a lot of money on this issue, thus my skepticism.
Bottom line, check the specs and if they are still using R-22 or one of the old ones, walk away. Service costs will mean lots of $$$$$.
Al
PS: Sorry for the rant but it felt good.
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