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Last seen: Aug 16, 2026
@johnnyb So my controller does shut off the heating when it gets to temperature, but most of the time the WC curve controls it so it doesnt happen. Th...
So a second update to incude Nov and Dec. The savings that would be made by adding a second 5kWh battery module would be £63 so far. If I could fit a ...
Sounds perfect 🤩
@raiph there is some info on 2094 here.
@johnnyb It sounds like you have got a good handle on this now and the reasons why its not performing well are getting fewer and fewer. Some kind of m...
@mike-h Yes, totally agree about false reassurance Mike. I was thinking that an error would always be in the same direction but I guess that doesnt ha...
@johnnyb No problem, glad it helped. So what flow temperature were you using on the heating last night? UFH is known to have quite a bit of hysteresis...
@mike-h Im not sure I follow you Mike. I can see that external temperature probes may differ from internal, especially if there is a long pipe run. ...
I think the low dT is a consequence of the low flow temp you are trying to use, 1.5-2 is small but although a dT of 5 is often cited as optimum, i don...
@johnnyb Thanks :-). I’m off out on a Xmas do tonight but will sit down and try to answer as many of your questions as I can tomorrow.
@johnnyb This formula does seem a bit contenious, but the results do seem to me to be closer to what is expected (obviously not to everyone though see...
@dunlorn @mike-h So the original post comes from the Heat Pumps UK facebook site, reference to it are shown below. The seem to think that the si...
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Degrees of Separation
Latest Posts
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RE: Who's your electricity provider and what's your tariff?
@old_scientist Have you ran the numbers as to which ...
By Papahuhu , 2 hours ago
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RE: How Accurate Is My DIY Heat Loss Calculation?
D'oh - of course. I shouldn't post before my brain is f...
By Old_Scientist , 4 hours ago
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RE: Questions about A2A for heating as well as cooling
@rob-of-york I would concur with the underfloor insulat...
By Toodles , 6 hours ago
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RE: New Vaillant Arotherm controls link to existing thermostats ; wired vs wireless
Nothing attached! I have rads but UFH makes the case ...
By JamesPa , 6 hours ago
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RE: Cooling with air to water heat pumps
Passive cooling should always be the first call. Keep ...
By JamesPa , 7 hours ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
@rob-of-york Thank you, I’m thinking along these same l...
By Toodles , 24 hours ago
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@Mars Good questions! The downstairs unit did the maj...
By Rob of York , 24 hours ago
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RE: Volumisers in Heat Pump Systems: Does Placement Matter?
@dave, I think @jamespa has probably identified the mos...
By Mars , 2 days ago
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RE: Plug and play solar. Thoughts?
My thought is simple. Bring it on and bring on plug in...
By JamesPa , 2 days ago
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RE: Heat Geek mini store vs pump size
Yes I agree, that’s why Heat Geek have most likely sele...
By Tomtheheatingengineer , 3 days ago
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@tomtheheatingengineer, thank you, and welcome to the f...
By Mars , 3 days ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
@majordennisbloodnok @tomtheheatingengineer For my ...
By JamesPa , 3 days ago
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RE: Is the "divide by 2900" rule still valid?
Really flow rate is a pipework limitation not a water p...
By JamesPa , 4 days ago
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