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Last seen: Nov 12, 2026
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...
Honestly, my first call would be to disable them. As I say above the main point of the volumisers is simply to add water volume (ie its a tank). The...
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Degrees of Separation
Latest Posts
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RE: Buffer tank on a 2 x 14kw Ecodan system
Pretty much as I had guessed in my crude scaling from m...
By JamesPa , 1 hour ago
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RE: Help me keep the faith with my air source heat pump installation
Well you have a vibration generator running at some fre...
By bobflux , 15 hours ago
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RE: Why don't people choose heat pumps?
@susannasaunders The link I have found may provide a li...
By Toodles , 17 hours ago
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RE: Who's your electricity provider and what's your tariff?
@downfield Thats a decent rate, I’m shocked they hadn...
By Papahuhu , 2 days ago
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RE: Should Households Who Can Afford It Pay More for Energy to Help Those Who Can't?
@batpred I mentioned earlier that targeting the payment...
By Toodles , 2 days ago
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RE: Adventures in heat loss calculations
@toodles thanks! So as suspected, around a doubling of ...
By SusannaSaunders , 2 days ago
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Six books in three years and I think I’ve now covered j...
By Mars , 2 days ago
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RE: Grant Aerona3 13kw - Buffer Tank - Heating Journey
@heymikey Well done in achieving as nearer a match acro...
By Toodles , 2 days ago
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Grant Aerona - Weather Compensation and Schedules
Im trying to set up a friends Grant Aerona. The WC curv...
By bontwoody , 3 days ago
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RE: Air-to-Air Heat Pumps & Air Conditioning: UK Heating and Cooling Q&A
@jamespa I agree, the efficiency of Cosy Cooler ought...
By Rob of York , 3 days ago
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RE: How much of your renewable and home setup would still work if the internet went down?
I think you're right! 🤨
By Transparent , 4 days ago
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RE: Renewables & Heat Pumps in the News
ECO4 muddies the water somewhat, and then some. I thi...
By cathodeRay , 4 days ago
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RE: Vaillant ecoTEC Plus - Flow Temp and Set Up
If there is a drain nearby that's exactly what I would ...
By JamesPa , 4 days ago
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I think that CCGT plant in Lingen is more likely to suc...
By Transparent , 5 days ago
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