> R-22 was phased out starting in the 1980s, and banned in 2010 (that's in Europe, maybe later in US). The situation with R-22 (better known as "Freon" in the

> R-22 was phased out starting in the 1980s, and banned in 2010 (that's in Europe, maybe later in US). The situation with R-22 (better known as "Freon" in the US) seems pretty messy and confusing. https://en.wikipedia.org/wiki/Chlorodifluoromethane#Phaseout_in_the_United_States https://en.wikipedia.org/wiki/Chlorodifluoromethane#Phaseout... As far as I can tell, the import of the R-22 refrigerant itself wasn't banned until 2020.