What attribute of R-410A refrigerant makes it more dangerous than R-22?

The attribute that makes R-410A refrigerant more dangerous than R-22 is its average operating pressures, which are significantly higher—by 50-70%. This increased pressure means that R-410A systems require components rated for higher pressure scenarios, which can impact system safety. If a leak or rupture were to occur, the higher pressure can lead to a more forceful release of refrigerant, posing a greater hazard to both technicians and the environment.

In comparison to R-22, which operates at lower pressures, the handling and maintenance procedures for R-410A must be adjusted to ensure safety, as the risk of accidents increases with higher pressure systems. Additionally, while other factors might contribute to the perception of danger, such as efficiency or environmental impact, the immediate risks associated with pressure during operation are a primary concern for safety when working with refrigerants.