the little corner room is indeed a loo,all I did in there was vinyl the floor and put a porta potti in. no shower as they're not necessary.also houses the table coats etc. the holes in the ceiling,there's 2,are exhaust fans I thought I might as well keep them,and the metal round the stove is just thin metal with an air gap behind,the screws are packed out with nuts about 15mm.i took the metal from her old van ,where the burner was even closer to the wood and there was no sign at all of the wood getting hot