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new refrigerants and oils

new refrigerants and oils

new refrigerants and oils

(OP)
I have been out of the a/c and refrigeration loop for several years, but I have found myself back in it. I had been an electrical inspector for a number of years and focusing on that. I would be happy with generalities, but specifics are nice. If anyone knows of good books or mags on the subject, please let me know. I have heard of 134a of course, but know there are several more out there now. Then there is the polyester oil? I am curious about window units, residential central, walkin and chest type refrigerators and freezers, etc. Thanks!

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