This mainly applies to the UK because our refrigerant Price's are going into orbit,had a look at an installation that my friend is going to undertake and he asked my advice,its second hand equipment the customer was using until 12 months ago we have been told it was on 408a but we are not 100% but its on a freezer room and the condensing unit is a ten horse prestcold R body any recommendations of which gas to use as 404a is not an option anymore.