Another option could be the Viessmann 200.
Very good modulation and Opentherm compliant. Works nicely with its own weather comp.
Plus a Stainless Steel heat exchanger, which supposedly maintain their efficiency much longer.
Gives you a couple of options at least.
Whilst this one may officially be boiler plus, it is hardly doing much.
It learns when it should come on. Oh wow.
From what I can tell, it can't fully talk to the boiler, to enable any proper load modulation (The controller isn't any good for that anyway).
My dad calls nails- 'a poor man's...
Plus it stops water sitting around in the tank, and it allows hot water to run through all the pipework. Minus the price of heating full kettles each week (and full kettles actually use a fair bit of power), and there probably isn't a lot in it price wise. Heck, if you tank is well insulated...
and come the winter you tell them to wrap up warm, as the heating isn't going on either!!!!
A couple of boiled kettles a week for dishes? I'm saying nothing! Unless of course you have a dishwasher
I have to admit a thousand questions ran through my mind when they said they rarely used the hot water.
Saying that, in the place my brother has moved into, it was noticed that the waste from the bath wasn't connected correctly. You'd have flooded the place every time you emptied the bath. So...
Yes, he quickly gave up trying to turn it up.
Instructions for it are pretty bad admittedly.
I assume the dial has something to do with it, but you know what they say about assumptions!!
Crikey. Can't be many prefer the immersion heater over a gas boiler.
Still, they may (or may not) be doing their bit for global warming! Assuming heating isn't being used at the same time anyway!
But yes, your hot water cylinder will have two methods of heating it. Hot water, which is getting...