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I wasn't ;-) Worcester suggested using a thermal store or heatbank as being the best in this instance, it isn't.
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sambotc
Haha no worries, I mis read your post.
If the potterton performa 24 eco he can take preheated water I agree. Not sure if it can though hence my suggested method.
Have you used the intaeco valve much solarsavings? If so how do you find them and who supplies them to you? (if you could PM a rough idea on price that would be great)
If the potterton performa 24 eco he can take preheated water I agree. Not sure if it can though hence my suggested method.
Have you used the intaeco valve much solarsavings? If so how do you find them and who supplies them to you? (if you could PM a rough idea on price that would be great)
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sambotc
Having had a quick look at the performa HE it appears to be a band B so no full modulation. I would hazard a guess that it isn't suitable for pre heated water as it would work off a set temperature rise 
I have used them quite a bit (mostly before pv) trade price is a little less than £170 but you can buy Grants combisol valve ? for around £125 and they will do the same job. You could of course make your own using two tmv's as we used to do.
EDIT: for clarity. my use of 1bar is working pressure or if you prefer, open pipe.
EDIT: for clarity. my use of 1bar is working pressure or if you prefer, open pipe.
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sambotc
How do these blending valves overcome the issues with the pre heat cylinder pasteurisation? If the water is only heated to 25 degrees in the tank through the winter months and then boosted to 60 through the combi in seconds, surely that doesn't meet the required amount of time to safely eliminate legionella?
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