R507 is an azeotropic blend of HFC refrigerants R125 and R143a. It has similar properties and characteristics to R404A and can be used in similar applications at medium and low temperatures.
It has a GWP greater than 2500 and virgin product cannot be used for servicing in the UK and EU in stationary refrigeration applications > 40 CO2 T eq.
R448A, R449A and R442A are potential replacements in direct expansion systems. Please contact Climalife for specific recommendations for your applications.