On Sun, 21 May 2017 19:38:25 +0100
mechanic wrote:

On Sat, 20 May 2017 20:37:20 +0100, Andrew wrote:

It's called the laws of physics. The faster you move cold water
through the combi, the less heat is transferred into it from the
heat exchanger.

I think that the heat is still transferred, it just has to heat more
water in a given time, so the temp rise is less. Wherever you
learned the 'laws of physics' you should ask for your money back.

In fact, the faster you move cold water through the combi, the MORE
heat will be transferred, as there is always cold water coming along to
take away the heat. But with a greater volume of water, the temperature
rise is lower.

--
Davey.