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Last seen: Aug 24, 2026
Sorry but that sort of says it all. On another forum that I dip into the Grant/Chofu unit gets a generally good review, although most seem to recomme...
The setup is design specific and a starting point should be the design flow temp at the desing min temp, but I guess you dont have these (or they were...
Sounds to me like an instant 10% penalty in efficiency, or more, for little tangible gain. Unless its properly controlled there will be mixing, which...
OK step by step. The bad news us that your installer is that clearly either ignorant about heat pumps or a cowboy or both. The good news is that you...
There have been some cold days recently so on those you would expect low cop. However operating at a fixed flow temp of 60C is sheer madness and will...
Is it a volumiser (2 ports) or a low loss header (4 ports). The latter can be a bit of a disaster if setup incorrectly, which is probably more likely ...
No offence intended, the comments were meant simply to reflect the facts that: 1. when developing a model for a class of system, its often a good id...
At this stage I will very happily settle for the same to within a factor of 2, given that they are from two completely independent approaches based on...
Thanks for the data health warning. I was struck by just how much difference adjusting for change in IAT made to the degree of correlation (have a lo...
The data should be capable of telling us the amount of energy contributed by other sources, it should appear as an intercept in the correlation curve,...
Thanks. I think your adjustment has the effect of moving the curve up or down, and mine the effect of changing the distribution. They are thus diffe...
Can you clarify whether this was composed after or before my post at 10.05. I have the impression before, but I could be wrong. Essentially my 10.05...
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Degrees of Separation
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...
By JamesPa , 3 hours ago
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@toodles possibly. The £9k labour charge for 4-5 days w...
By AndrewJ , 8 hours 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 , 12 hours 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 , 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…. ...
By Toodles , 1 day ago
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@tomtheheatingengineer, thank you, and welcome to the f...
By Mars , 1 day ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
@majordennisbloodnok @tomtheheatingengineer For my ...
By JamesPa , 1 day ago
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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...
By JamesPa , 1 day 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 , 2 days ago
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RE: The good, the bad and the not that great – my heat pump installation
@burtis, I’ve followed this thread pretty much from the...
By Mars , 5 days ago
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RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
First time poster here but I can share my experience as...
By SCH , 5 days ago
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RE: Is it the house or the equipment?
...which, I've found out, is pretty much impossible to ...
By Majordennisbloodnok , 5 days ago
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