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Last seen: Sep 7, 2026
@showi - thank you, that is very kind of you! We are, like Sisyphus, condemned to roll this ball forever! I will get back to you tomorrow.
There has indeed been a lot of discussion about whether setbacks save money and/or compromise comfort, including this mega-thread. The answer is not s...
Part 3: Hardware Installation After a barely excusable delay, I return to an account of how I set up my wired modbus connection to my heat pump, whi...
Living in a listed building, I attach a lot of importance to aesthetics, but I also have another constraint, limited wall space. Not only are the room...
But equally you need to have radiators that will put out enough heat at your heat pump's flow temperature, otherwise on cold days your house will be c...
Maybe start by plotting the data, and looking at the patterns? If you post the plots here, I am sure we can comment. For a start, you will be able to ...
I should really leave this to others better qualified than me to comment on R290, but I can say that P1 and K1 rads have much lower output than K2s an...
Indeed, onwards and upwards! This is almost certainly a factor in my case, see the SPAB report mentioned earlier. The spreadsheet model used U va...
Thanks for posting this. R squared 0.92, pretty good. Looks like around 240kWh at around -3 degrees C OAT, or 10kW power rating. Probably just ...
If many gas boilers can do true WC, ie no room stat interference, even less excuse not to do a trail in WC mode! For the record, how do gas boilers ...
@jamespa - your heat pump selection logic makes sense, and I also get the importance of aesthetics. This thread now demonstrates a fossil fuel boiler ...
@jamespa - an interesting chart, it shows the method working for a large fossil fuel data set. I suspect if you cleaned up the data a bit, you might g...
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Degrees of Separation
Latest Posts
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RE: Next steps on my ASHP journey: Radiators and Pipework
Or where you can fix the pwm% as you can eg with Vaulla...
By JamesPa , 11 hours ago
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RE: Where heat loss surveys seem to go against practical reality
@cathoderay and others. I think there may be some con...
By JamesPa , 11 hours ago
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RE: 7kW EV Charger Options Advice
Thanks. Yes, we have patchy 4G. The only option we had ...
By Rusty , 2 days ago
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RE: Being screwed over by Volkswagen Audi Group
Thanks, @batpred. That integration is the one I have in...
By Majordennisbloodnok , 2 days 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 , 2 days ago
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RE: Surface mount or bury primaries for heat pump installation?
@jamespa It's rusting 🙂
By tomasmcguinness , 2 days ago
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RE: Glass lined Cylinder for private water supply
Thank you, once again, for your replies. Yes...
By ian33a , 3 days ago
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It’s been out a few days and Amazon has already attache...
By Mars , 3 days 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 , 3 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...
By cathodeRay , 3 days ago
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RE: Solar Power Output – Let’s Compare Generation Figures
@tim441 Here are those same three month periods for 202...
By Toodles , 5 days ago
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RE: Adding additional Solar Panels to a DC coupled battery system
@transparent thank you for your reply above. As alway...
By Old_Scientist , 6 days ago
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RE: Adventures in heat loss calculations
@rob-of-york — thanks for posting this, all very useful...
By cathodeRay , 1 week ago
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