In the forthcoming report, the viability of applying alternative refrigerants with a GWP < 150 to domestic heat pumps (DHPs) with nominal heating capacities up to 50 kW will be considered. The assessment will reflect the proposed revision to the European F-gas regulation. DHPs currently use a variety of refrigerants, primarily R410A, but also R32, R407C, R404A, R417A, R454B, R454C, R452B, R448A, R449A, amongst others, all of which are medium or high GWP. A number of models already use R290, whilst other alternative refrigerants with GWP < 150 under consideration are R1270, R1234yf and R152a; all of which are flammable. These low GWP alternatives will be assessed, relative to R410A as baseline and R32 as leading medium GWP refrigerant.
The whole report will be soon available for download here