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Last seen: Aug 8, 2026
Very sensible. @old_scientist has very well described the design process starting with heat loss. You seem to know your whole house loss is ~3.5kW, ...
Mostly I find Vaillant controls good, but occasionally not. The legionella cycle warning (hot water) seems to come on before the cycle runs for examp...
No it's not and i think what yhey said is nonsense (how would ut work?) Boost is, so far as i have been able to tell, a one off 'on'. However I thi...
Not if you are systematic and patient. The high OAT end is logically something like 20 at 20, or more practically something like 25-27 @ 16 or there...
OK here goes (you did ask!) Radiator output is dependent on the area of the radiator and the temp difference (lets call it DeltaT) between ...
Not that you can buy economically. You can buy temperature sensors with displays for very little, but measuring flow is invasive so more complex. &...
Hi, this is just a quick reply to the above quote, I will look at pictures later today. It's not the flow rate you need to measure its the ...
Thats worrying, its like an obvious place for air to collect; why would you not put a bleed there (no need to answer that!)
In fairness my experience was 2 years ago. However the example you quote and that of @simonb seems to confirm it is still happening. The change t...
Firstly welcome to the forums and thank you for all the details. You are asking the right questions. Lets start with the 10mm tails. With...
COP of 17.7 exceeds the theoretical Carnot maximum so is definitely too good to be true. There are several periods when its producing energy but not...
Not sure exactly what your time pattern was when it didnt go how you expected but, if you still had midnight to midday programmed at 18.5 I would have...
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