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Last seen: Sep 20, 2026
If you have any cheap tariff the cost difference might not be that great. Its cheaper for me to heat DHW on the immersion at night, than on the HP du...
Agreed. For the avoidance of doubt I'm not suggesting anything else. However... What I also say above, perhaps for the first time in explicit t...
I wish I thought we could say that with any certainty, but IMHO we cant. The simple physics (the physics is simple, but unfortunately results an dif...
OK, all as I guessed. So, if the HP is heating DHW when defrost occurs then the defrost energy has to come from the DHW tank, unless it switches awa...
When I first read this I thought 'no way thats going to work', but then I thought about it more carefully and I think it might. However Im not an exp...
Noted. The problem I have with the report on openenergymonitor is that the samples given are all at fairly mild OATs (-2, -3) and the analyst is maki...
@old_scientist I saw this thanks. I am currently treating this article with a bit of scepticism. I could imagine that the figures in the capacity ta...
Before answering that, what do you feel is the problem which you would solve by reverting. Earlier on you seemed to have made some progress albeit th...
Ah that makes sense (I thought you meant an OAT of 15C). It confirms that the problem is insufficient water available from the system for defrost. ...
It sounds like it has insufficient system volume for the defrost (energy for the defrost comes from the hot water in the system). This problem is sol...
@skidoc I dont think there is a particular reason to argue for a split system and it would almost certainly require planning permission. Its also un...
Mine did that also, I wouldn't be surprised if its common/written into the MCS contract template. You get about 3 emails from the BUS people either ...
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Degrees of Separation
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RE: Next steps on my ASHP journey: Radiators and Pipework
@jamespa since going back to bed and reading again this...
By Singlespeed , 6 hours ago
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RE: Recommendations in Ely (Cambs) area for Full setup checks on Nibe HP setup for House.
If they can't don't give up. Heat pumps are, in reali...
By JamesPa , 22 hours ago
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RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
@ian-s I wouldn't be too concerned about the design ...
By Rob of York , 23 hours ago
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RE: Missing flow temperature in Heat Geek proposal
Yes that's what would happen by turning down the lsv to...
By JamesPa , 23 hours ago
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RE: Grant R290 DHW Cycle Interuption
It looks like some sort of short pre-run. The question...
By JamesPa , 1 day ago
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RE: Cascade System or larger single unit
@renewables345 I would say if it a new build it’s no mo...
By Aventus Eco , 1 day ago
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RE: Why are ASHP installs so expensive?
Posted by: @batpred There´s another aspect that coul...
By Rob of York , 1 day ago
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RE: Say hello and introduce yourself
@gz00, welcome to the forums. There’s a huge amount of ...
By Mars , 2 days ago
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RE: Home energy storage & battery register
1 fox ess lv5200 batteries, plus 2 more waiting to be i...
By Jimcub , 2 days ago
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RE: Heat Pump deployment statistics: June 2026
@l8again Unfortunately the government is, I suspect,...
By JamesPa , 2 days ago
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My feed of random industrial auctions turned up this au...
By Prunus , 2 days ago
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Thank you @majordennisbloodnok – that means a lot, part...
By Mars , 3 days ago
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We’ve just passed 20 million forum views! 🎉
It's official. The Renewable Heating Hub forums have of...
By Mars , 3 days ago
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RE: Who's your electricity provider and what's your tariff?
@batpred When the raw material input has increased in c...
By Papahuhu , 5 days ago
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