"dave" wrote in message
...
What temperature should an electric Immersion heater be set to?
Is there a recommended max (even though it may be possible to go beyond
that).
I've heard that if set too high, the pipes clog-up faster.

It is more a safety issue (AFAIAC) If you set it high then children may
scald themselves. So I set mine to uncomfortably hot, yet not immediate
injury, if you see what I mean, I believe this is about 60 - 65 degrees, but
best try it for yourself, then make sure you have enough hot to run a bath!
Some experimentation may be needed.