"Tony Bryer" wrote in message
...
On Fri, 17 Mar 2006 15:54:23 -0000 Doctor Drivel wrote :
Chav, you really are a dumbo. Here is the GasTec report:
http://www.zenexenergy.com/downloads/Final%20GasTec%20report%20for%20Zenex.pdf

Which says that during the summer season you can expect to cut your
DHW energy usage by 12%. On a modern house DHW is responsible for about
one third of energy use and most of this will be during the heating
season (greater part of year and colder water coming in).

"Added to this figure should be the instantaneous saving of ~2.47% that
this achieved whilst the boiler is operational in DHW mode. The total
saving is thus projected to be ~(38+2.47) % ie fractionally in excess
of 40%.

It is a thermal store of condensate. In CH running the wasted heat heats the
store of water to ~50-60C. As they said in most cases of small DHW
draw-offs the vast majority of heat will come from this small store. So, in
winter much of the wasted CH heat is reclaimed, and it is then used for DHW
use.

There are clear gain. When makers are attempting to grap the extra 1
litre/min of the competition, this is a real quantum jump in efficiency.

With some clever piping and controls this could also be used to boost UFH as
well.