Quote:
Originally Posted by gmercoleza
Agreed, I did not think it was legal to use Duracool in MVAC systems.
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Check that EPA link. HC refrigerants are legal, but not as replacements for ozone-depleting refrigerants (i.e., R12), and not where prohibited by state law. A handful of states don't allow it.
It is legal to use HC refrigerants in a factory 134a system, after evacuation. Mixing is now allowed.
It is legal to use HC refrigerants in a converted 134a system, as long as the system wasn't converted for the purpose of moving from R12 to HC. Then it isn't legal.