Ok, so I'm new on this forum and couldn't decide exactly where to ask my question, but here goes.
Technically, as per EPA regulations, ANY refrigerant (CFC,HCFC,HFC,...) must not be vented. I think we all understand what that means.
Now, what if I bought some canned air dusters, which is difluoroethane (R-152a) these days and technically an HFC substance, and used it to charge a refrigeration system. Would I be required to recover the gas, even though it came from a can that was basicly sold to be vented in order to dust electronics? Is this a double standard? Does the entering into a refrigeration system change the rules from "yes it's ok to vent the stuff to dust things off" to "no, it must be recovered since it is an HFC refrigerant"?