"John Stumbles" wrote in message
news
Now the main issue - choosing an appropriate boiler to cater for the
heatbank and also serve the heating (radiator) system. Following
various discussions with my plumber we have calculated our heating
requirements at around 26kw and to err on the side of caution we are
looking at boilers between 28-31kw.

That's an awful lot of heat. How many rooms
does your mansion have, to the
nearest dozen? :-)

The MAN can go down to 3kW so not a problem for the CH, but will heat the
Pandora zippo with DHW priority.

Or he could use a Glow Worm condensing boiler, (modulates down to 5kW) and a
stand alone Danfoss BEM 5000 weather compensator (about £190), with has the
cyl' stat wired directly into it and gives full heat of DHW and weather
compensted on CH. The compensator may be giving a CH flow temp of 45C, but
when DHW is called the full 80C is given to the cylinder, modulating down
when near heated.