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Last seen: May 17, 2026
After a lot of discussion earlier on this thread, with much help from @batpred and @transparent, I have come to the diagram below as my 'strawman' arr...
I agree with you, the assumption that DHW cylinders must always be replaced needs to be questioned. The mantra dates from the days of low temperature...
Please accept my apologies that I had misunderstood your intent. Please do post any further questions/ask for any advice you need as your journey pro...
Thats a good reply, hence the need for a checklist in cases where you aren't doing the job which, given you have a limited geographical reach, is a su...
By all means keep these controls so that you can use them, but plan not to do so. Instead set them all to max, operate the heat pump 24x7, and adjust...
I was going to give a similar response. If there were a service checklist (as there is with cars) then it would demonstrate the value of the activity...
to keep the manufacturer warranty when your warranty comes to an end, will you continue serving your heat pump - no, but I will do a couple of opera...
Classic isn't it. I will remember in future to suggest this to people experiencing odd errors. Now I come to think of it a similar procedure was sug...
Minimum system volumes are normally enough to cover defrost, which is critical. However a larger system volume may improve performance when the heat ...
You wont need one in heaven either which, at least according to the calculation originally published in Applied Optics, is hotter than hell (this has...
Latest Posts
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RE: Advice on Vaillant Sensocomfort
@jamespa Thanks, that’s useful. It also seems the ...
By Batpred , 6 hours ago
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RE: Debugging my legionella immersion heater
I notice this (66 is rather hot) with my legionella cyc...
By JamesPa , 12 hours ago
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RE: DIY Heat Pump Installations: Navigating Legal and Regulatory Hurdles
@transparent I thought you would spot that wind turbine...
By Batpred , 12 hours ago
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UK warm homes plan - how can it be delivered?
@editor Sobering thoughts on your article on the workfo...
By Batpred , 13 hours ago
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RE: Setback savings - fact or fiction?
You are right to be intrigued by it IMHO. SOFAIK it is...
By JamesPa , 20 hours ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
@swwils there is no logic to oversizing a heat pump. It...
By AgentGeorge , 23 hours ago
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RE: Vaillant Sensocomfort Time
Thank youy for the pointer. I think I have managed to ...
By ispookie666 , 2 days 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 , 2 days ago
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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: Sizing an ASHP; Heat loss and kW
You can't measure heat loss with a website. But you ca...
By JamesPa , 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
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Hi, Thank you. So its a Daikin Altherma 3M...
By Lbart68 , 3 days ago
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I have a Contactum CU. Would the below RCBO (descriptio...
By Batpred , 3 days ago
