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Last seen: May 16, 2026
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...
I think @ashp-bobba was referring to a possible airlock in the DHW circuit, near the DHW tank itself. As this is usually a high point in the DHW circ...
Welcome to the forums, you are asking the right questions. I had exactly the same experience, 2x+ oversizing (16kW 'surveyed' vs 7kW measured). The...
For most pumps yes, there are pumps that work the other way round so PWM off = 0%. This means that for most pumps removing the PWM cable forces it t...
@batpred I cant see how this risk relates to something that is different in German wiring practice than in the UK, unless German wiring practice has a...
I wonder what the import rates are going to do after March when the levies shift. The only information at present seems to be the of quoted 'average ...
Hi Im not a Grant expert but the Grant R32 manual says the following - it this the error? I wonder how it detects this error. ...
Good to hear that progress is being made! From what you and others say Octopus seem to recognise that there are issues with the Cosy 12 and working o...
@giganto Thanks for posting the photos which are very useful. You are asking the right questions! Without knowing exactly how the Honeywell is w...
FWIW the way the SoC of the (lead acid) leisure batteries on my narrowboat is determined (by a meter fitted for the purpose) is as follows: A low ...
@batpred @majordennisbloodnok I think all three of us are broadly saying the same thing, albeit with slightly different emphases, namely: ...
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 , 9 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 , 9 hours ago
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RE: Vaillant Sensocomfort Time
Thank youy for the pointer. I think I have managed to ...
By ispookie666 , 10 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 , 11 hours ago
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@majordennisbloodnok good advice, thanks for that.
By David999 , 14 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 , 17 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 , 2 days 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
