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Last seen: May 16, 2026
Interesting and possible I suppose. Of course this behaviour might be firmware-version dependent. I have never tried turning it off, but I think I w...
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...
Latest Posts
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
@swwils mine is mostly off now. Hot water for an hour ...
By AndrewJ , 8 hours ago
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RE: Setback savings - fact or fiction?
I too agree with what you say, and am grateful to you f...
By cathodeRay , 8 hours ago
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RE: Vaillant Sensocomfort Time
Thank youy for the pointer. I think I have managed to ...
By ispookie666 , 9 hours ago
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RE: Forum updates, announcements & issues
I have been doing a lot of work on the site lately and ...
By Mars , 10 hours ago
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@majordennisbloodnok good advice, thanks for that.
By David999 , 13 hours ago
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RE: My Grant R290 9kW Heat Pump Installation
I am following this thread with great interest and than...
By TaffontheTaff , 16 hours ago
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RE: Sizing an ASHP; Heat loss and kW
You can't measure heat loss with a website. But you ca...
By JamesPa , 1 day ago
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RE: Estimating true heat loss from twelve months of consumption data
@ian33a — I have a sort of residual interest in this pr...
By cathodeRay , 1 day ago
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Hi, Thank you. So its a Daikin Altherma 3M...
By Lbart68 , 1 day ago
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I have a Contactum CU. Would the below RCBO (descriptio...
By Batpred , 2 days ago
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RE: Samsung gen 7 HP 12kw - auto control issue and water law
@chainreaction Agree with @broadsman , it seems many ...
By Batpred , 2 days ago
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RE: Anyone concerned about GivEnergy?
@transparent Thank you and appreciate your timely reply...
By SUNNYSKIES , 2 days ago
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RE: Grant Aeona 3 R32 cycling with weather compensation.
The hot water heating looks normal. The heat transfer ...
By GrahamF , 2 days ago
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RE: A2A vs A2W: Which Heat Pump Would You Pick?
Good questions @temperature_gradient. My understanding ...
By springswood , 2 days ago
