HFC410A

HFC-410A, also written as R-410A, is a hydrofluorocarbon refrigerant blend used primarily as a replacement for ozone-depleting R-22 in air conditioning and heat pump systems. It is composed of approximately equal mass fractions of difluoromethane (R-32) and pentafluoroethane (R-125). The blend provides good cooling efficiency and is designed to operate at higher pressures than R-22, so equipment must be rated for these higher service pressures.

Environmental properties of HFC-410A include zero ozone depletion potential and a relatively high global warming potential (GWP), typically around 1924. The refrigerant is generally classified as non-flammable in the completed system classification, though the individual component R-32 is considered to have a low flammability, which informs handling and safety considerations. Leaks should be avoided because R-410A can displace oxygen in enclosed spaces and rapid release can cause frostbite on contact with skin or eyes.

Applications and handling requirements: HFC-410A is widely used in residential and light commercial air conditioning and heat pump equipment. It typically requires polyolester lubricants compatible with the refrigerant. Servicing involves proper recovery, reclamation, and charging procedures to minimize emissions and meet regulatory requirements.

Regulatory context: Many regions are phasing down high-GWP HFCs to curb climate impact, encouraging the adoption of lower-GWP alternatives such as R-32 or other blends for new equipment. R-410A continues to be common in existing installations and in equipment designed for it, with ongoing emphasis on leak prevention, safe handling, and recovery at service.