Tony Bryer wrote:


The thermostat in the hall controls how hot the house gets (assuming
it's wired correctly of course g). When the set temperature is reached
the boiler stops running.

The knob on the boiler controls the maximum temperature that the boiler
heats water to. If you set it too high the boiler runs less efficiently
and will be stop/starting unnecessarily often. If you have it too low
then the house will never get warm or take a long time to do so. If the
boiler is also heating a HW cylinder then setting the boiler stat low
(which is a good thing from an efficiency pov) has the disadvantage of
extending the time to reheat the cylinder after a bath, which may or may
not be material in your case.

Thanks for that, cos it was going to be a question from me :-)

We have a power shower and I usually set the boiler temp so that with
the shower control vertical, we get a comfortable shower, but this
winter I have left the boiler temp on its summer setting.

Dave