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Last seen: Sep 20, 2026
I still am not sure you get the point of volumiser tanks. They add water volume to the system. They don't need power. Grant and others take the op...
Are you saying your design flow temperature (at the lowest oat) for the ashp system is 55C? Fans on fancoils do run constantly, but with a decent...
I'm sorry but I don't understand your maths. If you need 2.4-3kW output then you will need a radiator rated for about 6kW at 50C DT. That's a very bi...
I think that's very likely. Thus if you set all external controls to be permanently on you should be able to optimise the wc curve to the lowest poss...
Please post back on how you get on. You need to give some thought to those ufh loops, they can't be allowed to suck energy out during dhw cycle. Re...
They will run without a fan but output is then less than a radiator of same size. I thought you were struggling to fit a passive radiator in hence w...
Could a fan coil be suitable. I had a similar problem which was solved with a fan coil.
Ok that's clearer. It's a pity about the manifold pumps, they effectively stop the ashp having the control it needs to make sure everything works pr...
Thanks, thats helpful. There seems to be a circular path around the upper volumiser, is this correct (it could be, perhaps the upper heat pump is the...
Only to the extent that the heat has been produced at a lower COP than your space heating. But as you are probably talking 1-2kWh max per day, who ca...
I hope and think so. this stuff is quite complex to describe!
This is indeed ambiguous!. One would expect, since this is in a section called 'room influence' that it means ambient in, but it is unclear. the ba...
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Degrees of Separation
Latest Posts
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RE: Next steps on my ASHP journey: Radiators and Pipework
I have one of these fitted which also allows you to reg...
By Old_Scientist , 47 minutes 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 , 1 day 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 , 1 day 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 , 1 day 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! 🎉
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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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