Refrigerant R422b, NU22b

R422B (often sold as Nu-22B™) is a non-ozone-depleting HFC blend designed as a "drop-in" replacement for R22 in residential and commercial AC systems. Composed of R125, R134a, and R600a, it works with existing mineral oil, often requiring no oil changes. It provides similar operating pressures to R22 with minimal capacity loss.