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Last seen: Sep 4, 2026
@cathoderay Yes, it does look much better, thanks for suggesting it. I do now log gas consumption for DHW additionally to the total consumption, so it...
@cathoderay I've deblobbed the chart and extrapolated. Also gas usage for DHW was a crazily high 39 kWh per day mainly because the circulating pump ...
The Vitotronic 200 WO1C control unit manual can be downloaded here (link will download the PDF manual): Viessmann Manual The relevant descriptions a...
@cathoderay @transparent @jamespa I've got data from my outside temperature sensors (mounted on a shaded, north facing wall) so I might try again usin...
@jamespa Thanks for this. Let me address the hot water point first. The basement plant room has two Viesmann Vitocell 300 hot water cylinders, each wi...
@transparent Sorry for the silence, I'm working today but will reply properly this evening (yes, ERA5 was Claude's choice, but I can go back to degree...
@jamespa @transparent Sorry about that. Here are the charts, hopefully these are a bit easier to follow than the text:
@bobflux It was originally, but now both are using the same heating curve, with the TRVs fully open.
@jamespa I have revised my figure downwards as a result of your scrutiny, so thank you! The challenge about wanting to see the raw plots, and the ques...
Hello everyone. I've recently found this forum and thought I would detail my setup as I've spent a lot of time on it over the years. My house was ne...
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Degrees of Separation
Latest Posts
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I am amazed that there is not something out there to me...
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RE: Next steps on my ASHP journey: Radiators and Pipework
@bobflux The hydraulic simulator is very interesting...
By Rob of York , 9 hours ago
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RE: 7kW EV Charger Options Advice
Thanks. Yes, we have patchy 4G. The only option we had ...
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RE: Being screwed over by Volkswagen Audi Group
Thanks, @batpred. That integration is the one I have in...
By Majordennisbloodnok , 1 day ago
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RE: How Accurate Is My DIY Heat Loss Calculation?
@batpred I suspect it will be more this year. I had 9 ...
By AndrewJ , 1 day ago
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RE: Surface mount or bury primaries for heat pump installation?
@jamespa It's rusting 🙂
By tomasmcguinness , 1 day ago
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RE: Glass lined Cylinder for private water supply
Thank you, once again, for your replies. Yes...
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It’s been out a few days and Amazon has already attache...
By Mars , 1 day ago
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RE: Missing flow temperature in Heat Geek proposal
Yes, and this is another point I agree. We did find a f...
By Batpred , 2 days ago
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RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
A very good point. In effect, the DHW pipework is an em...
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RE: Solar Power Output – Let’s Compare Generation Figures
@tim441 Here are those same three month periods for 202...
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RE: Adding additional Solar Panels to a DC coupled battery system
@transparent thank you for your reply above. As alway...
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@rob-of-york — thanks for posting this, all very useful...
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