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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.

Was recommended to me on here, albeit not got round to trying it yet. But seems the right thread: https://www.theheatinghub.co.uk/

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...

Looks like even I screwed up somewhere as well(n)

And are the rads staying on longer? Are the rooms heating up towards 25?

It's an average wattage per hour. As said, each hour could be different.

0.26KWhr for 2.75hrs is 0.715KW.

No, as you are confusing KW and KWhr

1kw equals 1000 watts, so yes

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...

Scrap that. It seems to be asking for something.

I'm pretty sure my Honeywell is complicated when you get into the programming. But at least I have an on/ off button and up/ down buttons. I don't need to go any further than that, and have never had any need to look at the instructions. I'm assuming turning the dial never did anything on our...

According to instructions. The small 20.0 in the bottom right is the set point. The large 17.0 in the centre is the current room temperature. I can't believe there isn't a simple on/ off button and up/ down buttons.

I've just tried reading the instructions and all I came away with was a headache! Nowhere did it seem to tell me how to raise or lower the temperature. The obvious would be to turn the dial. If that doesn't work I'd be screaming at the installer for providing such a stupid thermostat. I'm not...

https://neomitis.com/Instruction-manual.html Pick the thermostat you have, and download the instructions. Looks like you have the RT7RF Plus.

You did kind sir, and I thank you for that. It is actually a website I had been on once or twice as part of my homework. However once I get home, I will give them a bell.