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Last seen: Aug 24, 2026
@cathoderay @derek-m I think I am making some progress untangling the data above provided by @cathoderay. The raw data showed a tolerable, but no...
@cathoderay Not an answer just some more analysis to ponder. Here is a table, taken directly from the minute by minute data, of heating energy (from...
Thats almost certainly a part of it. What I also suspect is that the previous 24hrs matters a lot, and so far as I can tell from the graphs the OAT w...
It would be interesting to answer this. Can you post the two graphs you are comparing and also the previous 24hrs on each case?
Definitely worth a read but not earth shattering. It hints at some minor tweaks to pd rights, but no revolution. Interestingly it repeatedly states ...
Best consumption will almost always be obtained by tuning the WC to match the load (ie not on/off except as a temperature limiter when eg solar gain t...
Thats a result then! At 32C WC doesn't actually make that much difference, about 10% or less, whereas its more like 20% at 45C. So fixed flow...
Thinking about this a bit more, for a house like yours (which, based on your figures, has a high thermal mass and is thus essentially an energy integr...
As you say heat loss calculators are a tool we have and when you can't make a measurement you have no choice but to resort to a model. I thin...
Interesting graph. The early cycles look like they might be minimum output cycling, but after 9pm (and particularly at midnight) its gets a bit more ...
I was faintly conscious that you had come to the conclusion that it was in fact undersized, but not sure on what basis. I wouldn't trust the Freedom ...
Did I miss some data on the heat loss of @cathoderay 's house. I don't recall seeing an experimentally determined value (and I think you know what I ...
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Latest Posts
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RE: Volumisers in Heat Pump Systems: Does Placement Matter?
Volumisers are normally plumbed so that they are in the...
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@toodles possibly. The £9k labour charge for 4-5 days w...
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RE: Plug and play solar. Thoughts?
My thought is simple. Bring it on and bring on plug in...
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RE: Heat Geek mini store vs pump size
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By Tomtheheatingengineer , 1 day ago
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RE: Who's your electricity provider and what's your tariff?
@chandykris Swings and Roundabouts, you win some…. ...
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@tomtheheatingengineer, thank you, and welcome to the f...
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
@majordennisbloodnok @tomtheheatingengineer For my ...
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
There is scope for product development here. I for one...
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RE: Is the "divide by 2900" rule still valid?
Really flow rate is a pipework limitation not a water p...
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RE: The good, the bad and the not that great – my heat pump installation
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First time poster here but I can share my experience as...
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RE: Is it the house or the equipment?
...which, I've found out, is pretty much impossible to ...
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