Is there such thing? The regulations assume a partition in the zoning. In this scenario the shower is a box room of about 1m by 2.5m with the shower in the far end and the loo and basin to the door. There was once a heater with the fused spur external in the hallway. Since then the shower now has been effectively turned into a wet room but the customer is elderly and feels the cold and there is no other heating in the room bar a small electric towel rail. What could I possibly fit?