a mixture of two or more substances of different properties.
In a zeotropic blend, the blends boil out at different temperature but at the same pressure. typical example is R704
R22 needs import license,R410A does not need anything special
Azotropic will only have one boiling or condensing point for each system pressure negligible fractionation or temperature glide will occur Zeotropic will have a range of boiling and condensing points for each system pressure noticeable fractionationand glide will occur.
R134A, R22A, R404A, R410A and many more
R-12..........
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They use R410a eco friendly refrigerant gas now.
short answer: Only people with and EPA certification may purchase R22 and/or R410A refrigerants.
One refrigerant that is chlorine free is cfc-22. This refrigerant has gained popularity in the past few years in many homes.
With any refrigeration unit - doesn't matter whether it's an unit with R410a, R22, R12, R134, etc. - you have a rapid exchange of heat taking place between the refrigerant and the ambient air passing through the fins. Condensation will result as a byproduct of this process. Don't be freaked out if you see a bit of water - that's quite normal.
As of now, Air conditioner uses R22 refrigerant. In coming days ACs will come with refrigerants such as R410A, R407C etc.