The only refrigerants used as a replacement for R-12 is 134-A, it is a HFC freon. Thid does not destroy the ozone but it cannot not be vented. Other refrigerants claim they can be used. but the EPA has the final say. Go to the EPA website and check.
R-12 Depletion factor 1.0
Halons are much more damaging to the ozone.
R-22 will be phased out by the year 2030 (zero production)
R-12 Depletion factor 1.0
Halons are much more damaging to the ozone.
R-22 will be phased out by the year 2030 (zero production)