R-448a

The R-448A refrigerant gas is an HFC+HFO blend and a direct drop-in replacement for R-404A and R-507 in existing systems. It is a blend of R-32/125/134a/1234ze/1234yf in the following proportions: 26% CH2F2  · 26% C2HF5  · 21% C2H2F4  · 7% C3H2F4  · 20% C3H2F4