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Last seen: Oct 31, 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...
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...
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Degrees of Separation
Latest Posts
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RE: Boiler Upgrade Scheme funding reduced by circa £750 million in 2026 budget
I think I'd argue that's not the case - in fact that mi...
By EtchedPixels , 2 hours ago
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RE: The Changing Jet Stream Could Challenge UK Air Source Heat Pumps
@etchedpixels Agreed, just a thought for others. I a...
By Watcher , 2 hours ago
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RE: Marvel Heating liquidation
In another post in another thread I have added my thoug...
By JamesPa , 4 hours ago
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RE: DIY powerflushing tutorial
Nice contraption- I like this kind of thinking. Last ye...
By Travellingwave , 13 hours ago
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RE: Vaillant ecoTEC Plus - Flow Temp and Set Up
Heating been on for 4 weeks now, continuous. It's 6C o...
By trebor12345 , 23 hours ago
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Coming back on subject... A shortened version of the ...
By Transparent , 1 day ago
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RE: Say hello and introduce yourself
Perhaps it is time for an update on ‘our’ project. We h...
By Toodles , 2 days ago
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RE: Free app: run the immersion / heat pump from Growatt battery & solar surplus – no Home Assistant
Please bear in mind, everyone, that in order to use thi...
By Majordennisbloodnok , 3 days ago
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RE: The good, the bad and the not that great – my heat pump installation
@burtis Thanks for posting this and Im so pleased you ...
By JamesPa , 4 days ago
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RE: I need help with Ecodan ASHP
@f1p It turns out there have been a solar panel install...
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RE: 15kw pump for 225m2 1990's house - over kill?
@seaviews your installer would be right to say that the...
By GrahamF , 4 days ago
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RE: Tradespeople on Their Phones: What’s Acceptable When They’re Working in Your Home?
Actually, that's a very important point. I've only ev...
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RE: Aerotherm and weather compensation
These are likely inked. The basic explanation is tha...
By JamesPa , 5 days ago
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RE: Electrical works for air to air heat pump
agree with above. I have not had extra costs added wh...
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