HCFC-22 may not have been historically a refrigeration refrigerant, but it sure has been high on the minds of those wholesalers who deal with a lot of refrigeration products.
It began years ago with the phase out of CFCs, causing many refrigeration equipment manufacturers to shift to R-22 in low temperature applications — even if initially a bit challenging — while awaiting later generations of equipment working with HFCs such as 404A and 507.