Cheers MS, I suppose it gets the name care due to its properties producing a low carbon footprint, but shadowing the fact it having a greater risk of a loss occurring if its in a system designed and built by an accountant and not an engineer?

Digressing slightly.

As I previously mentioned in another thread, I have lpg on my gas safe card to be used as a fuel, but no assessment for using as a refrigerant. So I should imagine it can't be used in a room lower than ground level and has to have low level ventilation away from trapped drains and the like?