thanks for the advice Tim, it's ok though, I am safe on this one. Without being too nerdy, the heater I have is 100% efficient so it burns everything
, but they don't have a flue! You aren't meant to use them in an enclosed room as they could burn all the available oxygen, sounds a bit crazy but I checked with the manufacturer and as long as I only use it for a couple of hours and keep a door open to let fresh air in then its fine. The idea is that the walls and furniture get warm, used in warehouses etc they presume a flow of fresh air from the loading doors etc.
Thanks for you concern though.
PS
Signed on the Padron this morning, easy peasy. off to the education centre in Ibizza tomorrow!