R410A, also known as AZ20, is a blend of HFC refrigerants now commonly used for air conditioning applications. R410A was not designed to retrofit existing R22 systems but many manufcturers have used its superior qualities to build products with higher efficiencies. It’s composition comprises: HFC-125 (50%), HFC-32 (50%). It is non toxic and non flammable meeting the highest A1/A1 classification.