Can a inner heat boiler be sited surrounded by a bathroom it is contained within a cupboard? ...
Answers: Yes you can providing it is room sealed, the power should be a switched fused spur and should also be surrounded by the cupboard, or outside of the bathroom, be sure to check ventilation contained by compartment instructions in the installation instruction book, though most won't require it these days. No module of the boiler, cables etc should be touchable from standing contained by the bath.
yes it can