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Last seen: Oct 20, 2026
@lakey Do you have half hourly or daily readings and what was the heating pattern. Basically my ashp was sized on gas meter readings and the fabric s...
Thats the only logical explanation because for their main function they emphatically dont. Could be, then once he had received them he realised t...
I remember thats where you started (conservatism in heat loss). What do you actually know in total about heat loss. Do you have any consumption fig...
Once its running at lowest possible FT you might be able to reassess the operating mode when its mild. Depending on your house, when its mild (which ...
Fair enough. Obviously you understand that you will take a running cost hit but all designs are a trade off. 45 is often a good compromise for radia...
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.
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