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Last seen: May 18, 2026
Ok please post back once experiment complete. Give it a couple of hours to be sure. Ok looks like you have an llh which makes fault diagnosis mo...
You are in essence right. Adia only works with selected heat pumps and I dont think cosy is one of them. Don't worry, none of this is necessary if ...
I hear what you say but I would still perform the experiment it to be absolutely certain. Some thermostats, which should never be used with heat pump...
The black cylinder in the second photo looks like an llh. Is there a water pump nearby and how many pipes feed it? You can't ignore the fault wheth...
Here are my comments, others may have something to add or even dispute what Im suggesting. 1 - Yes ideally, but it doesnt matter that much so not so...
Possibly, but it would also reduce DeltaT across the emitters which means that mixing matters less. With a small buffer tank (such as 50l commonly fi...
@fleurcules Welcome to the forum and hopefully we can help. Im not a Grant expert but will try to offer general advice, but first a couple...
Sorry, but I cant see what the point of this is unless its to take the mick from a serious topic (and possibly also of science). Its not even funny b...
TRV heads do indeed close completely once room temp is reached (or thereabouts), by depressing the pin on the valve fully. However there is a degree ...
Yes. In addition or instead. The point us that trv bodies with decorations caps offer an alternative (or additional) and more linear adjustment mec...
Yes. In addition or instead. The point us that trv bodies with decorations caps offer an alternative (or additional) and more linear adjustment mec...
Provided it's sufficient I can't think of any reason in physics why system pressure would affect cop
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RE: ASHP Capacity loss with aging
This is a good question. The short answer IMO is yes, c...
By Mars , 5 hours ago
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RE: Daikin Altherma 3 with Fan Coils in Puglia (Italy)… Sanity Check on System Operation
Welcome @simon_jm, and this is not a dumb question at a...
By Mars , 5 hours ago
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RE: Loud noises in the night - and one for the toolbox?
Brilliant bit of lateral thinking, and a useful one to ...
By Mars , 7 hours ago
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RE: Setback savings - fact or fiction?
Yes, also the higher OAT end is possibly a smidge high ...
By RobS , 7 hours ago
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RE: UK warm homes plan - how can it be delivered?
@bobflux My view is that regulation for consumer pro...
By Batpred , 9 hours ago
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Hi Mars, I've sent you a request to connect me with a...
By sttpd1917 , 10 hours ago
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RE: Sizing an ASHP; Heat loss and kW
Annual consumption is almost certainly better than an E...
By JamesPa , 14 hours ago
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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 , 16 hours ago
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RE: Advice on Vaillant Sensocomfort
The latest Vaillant announcement I saw said that they w...
By JamesPa , 20 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 , 1 day 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 , 1 day 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 , 2 days 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 ...
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