22 December 2011
Two developmental refrigerants, DR-5 and DR-2, are evaluated as potential working fluids for residential,
commercial and industrial heat pumps. Both fluids are based on Hydro-Fluoro-Olefin technology and have no
ozone depletion potential. DR-5 is a promising R-410A substitute. DR-2 is a relatively low pressure fluid especially
promising for high temperature heat pumps (HTHPs).