Following the new European directives on use of refrigerants, Dorin focused in the past months and still today is committed with its R&D department to study and evaluate performance tests of its compressors with several different alternative synthetic refrigerants.
Internally, aiming always at meeting 100% the customers needs, Dorin has based the development on the following proposal:

Alternative	Actual utilized
R448A	R404A and R507A
R449A	R404A and R507A
R450A	R134a
R513A	R134a

with a special eye for the moment towards R449A.

R449A gives a GWP far lower than 65% compared to the actual R404A and 507A, and being non flammable enters the A1 flammability class. This means that changing in a system from R404A to R449A there are no particular restrictions following the ATEX normative.
DORIN strongly suggest the use of POE oil verifying carefully the acidity of the same each semester.

Speaking about performances and efficiency of the system, Dorin underlines that when using R449A in existing systems, the temperature glide to be considered is around 5K since this has a sensitive impact on performances. In MT applications the refrigeration capacity is similar to the one with R404A and R507A but in BT applications the capacity could be slightly lower. Hence DORIN recommends to refer to the its Technical Department before such applications.