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Originally Posted by R Leo
They used to use R12 but have switched to R134a. Really old refigerators used R717 (ammonia) and R764 (sulphur dioxide). Some commercial equipment uses R502 but I've never heard of a refigeration (like a refrigerator or freezer) system using R11 or R22.
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Sooooo, you're saying I can capture all that 'free' R-12 in my old Frigidaire in the garage? I Googled this a while back, and all the references I could find indicated that they used R-11/22, but I'm a A/C noob, so what do I know? My new Kenmore bottom freezer unit uses R-134a.