More and more residential and light commercial air conditioning equipment is being built with HFC-410A instead of HCFC-22. The refrigerant is being made by several manufacturers under different brand names. All carry the ASHRAE number R-410A.
Contractors and technicians need to know that R-410A can only be used in equipment designed for R-410A. It cannot be used to retrofit existing R-22 equipment due to significantly higher operating pressures. Furthermore, special service equipment is required, such as a high-pressure manifold gauge set, a high-pressure recovery unit, and a high-pressure recovery tank.