Which refrigerant is considered non-flammable and non-toxic?

The refrigerant R-22 is well-known in the HVAC industry for its effectiveness in cooling systems and its non-flammable and non-toxic characteristics. R-22, also known as hydro chlorofluorocarbon (HCFC), has been widely used in residential and commercial air conditioning systems. Its properties make it a safe choice from a flammability and toxicity standpoint when handled appropriately.

R-12 and R-134A are considered non-flammable and non-toxic as well, but they fall under different classifications and environmental considerations. R-12, being an older refrigerant, has been largely phased out due to its ozone-depleting potential. R-134A, while non-flammable and non-toxic, is also being phased out in many regions because of its global warming potential.

R-410A, while a popular choice in newer systems, is a refrigerant blend containing a higher pressure rating and is not classified the same way in terms of flammability and toxicity as R-22.

Overall, R-22 stands out for its long-standing use and the balance of safety in handling, which is why it would be considered in the context of non-flammable and non-toxic refrigerants, despite its environmental concerns leading to a