Morten wrote:

If there is no hot water coming from the boiler then a thermostatic
mixer is not going to do anything useful, it can't heat the water!


Correct, but it will make the too hot water last longer because you're
mixing it with cold water intil the required temperature is reached. When
the incomming water gets to cold you're back to sq1 but it will take longet
to reach this state...

With a stored water system this will be true, with a combi that is
working correctly it should not make any difference since the hot should
not run out...

(Still worth having a mixer mind you, to protect you from scalding /
freezing every time a tape gets turned on elsewhere when you are in the
shower!)

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/