Hi, I have a similar question to Joanie about these type heaters, the EBH models that is permanently mounted. I think they run in a system or series because twice in 2 different rooms the heaters have gone out when 1 went out. The latest was when the thermostat (PSG Lin-STAT) blew, the wiring melted, the thermostat melted . We replaced the thermostat with the older type we kept but neither of the two heaters come on. In the hallway the same thing, the heaters haven't worked when 1 of them stopped working. It's difficult to know which without replacing all of them.