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Last seen: May 18, 2026
@fiona @johnbroome I'm sorry to hear this. Can I just ask if you have done the key things which are necessary to get a heat pump working both che...
For me this sums up what I have learned in my 3 year journey so far. Of course 'caveat emptor' is universally true - if there is an opportunity to sc...
In a word yes. Measurements based on a single day should be treated with extreme caution, houses take a long time to react. However as a ...
Newbuild 200sq m house, 16kW? Somebody is having a laugh at your considerable expense. Either the construction standard is appalling or the loss is ...
I would describe this as either a fault or a configuration error. If the ft isn't changing with oat then wc isn't working, your heat pump won't be ef...
@johnbroome As I say I think you probably have a fault which needs fixing. However there may also be an opportunity to tweak how it's run. The un...
Interesting. Judging by my house which is different is several ways (some better, some worse) I would have guessed ~7kW as the actual loss, however y...
OK, I see from your other post that this is quite an old installation and things have recently changed which suggests a fault. I believe @editor is l...
So far as i can see no because its NOT connected to the neutral, its connected to the metallic sheath of the distributor’s service cable into the prem...
Sorry to heat that - it should be possible to improve on this situation. 'The rest of the house cold' suggests you are not heating the whole house,...
That matches the TN-C-S diagram here Your post crossed with mine which has both diagrams from the IET and a bit of a comment.
Please dont feel obliged to respond quickly or at all, we all do this in our time on an as and when basis. I am very grateful for any input which has...
Latest Posts
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RE: Sizing an ASHP; Heat loss and kW
Annual consumption is almost certainly better than an E...
By JamesPa , 42 minutes ago
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RE: UK warm homes plan - how can it be delivered?
No rule that says we do so far as I know. Like much o...
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Grant Aerona R290 (15.5kW) - How is DHW Target Temp calculated?
Hello all, We have just had a Grant Aerona R290 insta...
By TaffontheTaff , 2 hours ago
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RE: Setback savings - fact or fiction?
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Loud noises in the night - and one for the toolbox?
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RE: Advice on Vaillant Sensocomfort
The latest Vaillant announcement I saw said that they w...
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RE: Debugging my legionella immersion heater
I notice this (66 is rather hot) with my legionella cyc...
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RE: DIY Heat Pump Installations: Navigating Legal and Regulatory Hurdles
@transparent I thought you would spot that wind turbine...
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
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By AgentGeorge , 1 day ago
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RE: Vaillant Sensocomfort Time
Thank youy for the pointer. I think I have managed to ...
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RE: Forum updates, announcements & issues
I have been doing a lot of work on the site lately and ...
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@majordennisbloodnok good advice, thanks for that.
By David999 , 2 days 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 , 2 days 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 , 3 days ago
