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Heated Towel Rail.

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A customer of mine asked me to install a new time switch to turn on his heated bathroom towel rail in the morning via its internal electric heating element. The towel rail is a big beast, about floor to ceiling in height and rated electrically at 900 Watts. It is also plumbed into the gas central heating system but has a separate electrical heating element as well. I was wondering if the thing could:


1. Overheat and the element be damaged if both systems are heating it?


2. Be thermostatically controlled by its own internal element. We have no paperwork.


Z.
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    or 3. Any overheating due to both the CH and electric element being on at the same time will be mitigated - both because the higher temperature will mean greater heat loss from the radiator to the room, and because the supply of reasonably constant temperature water from the CH system (at say 60 degrees) will tend to cool the heating element when it gets hotter than that - effectively drawing heat from the electric element and pumping it around the rest of the CH circuit. Not a particularly elegant or efficient position to be in of course, but not overly worrying either.

      - Andy.
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    or 3. Any overheating due to both the CH and electric element being on at the same time will be mitigated - both because the higher temperature will mean greater heat loss from the radiator to the room, and because the supply of reasonably constant temperature water from the CH system (at say 60 degrees) will tend to cool the heating element when it gets hotter than that - effectively drawing heat from the electric element and pumping it around the rest of the CH circuit. Not a particularly elegant or efficient position to be in of course, but not overly worrying either.

      - Andy.
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