one of the most versatile replacement refrigerants for R-22, R-417A, and R-407C
on the market today. NU-22B (R-422B) is a non-ozone depleting blend, which can
be used as a direct replacement into systems still operating on R-22, R-417A,
or R-407C. It is compatible with all standard air conditioning and
refrigeration system lubricants.