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Last seen: Nov 2, 2026
One school of thought says put almost nothing in and instead treat only to VDI2035 which is a German standard. So far as I can see there is a lot to ...
Im not sure what your thought process is here. Are you suggesting running with a max FT of 40 rather than the max of (say) 35 that the UFH is likely ...
The nominal will be the flow rate for rad dt5 at full output. Ideally you should be looking to achieve this but.. your 16kW heat pump is likely well ...
@adam That all sounds very sensible and I agree with your analysis. Like you I turn on the immersion on the very coldest days, because I run low n...
No chance! Largely, hence my suggestion to do some experimenting with the Homely set temp set to 30C, thus taking that element of control out of ...
@chinkoa Sorry there are two separate thoughts going on which I didn't make clear: "What's the capacity of the heat pump. Flow...
Agree. I think I have given you several pointers to help track it down, its now up to you whether to pursue any or hope your installer will diagnose,...
@papahuhu sorry - confusing info in previous posts Anyway upstairs rads aren't getting to anything like the flow temp it seems so that needs to be f...
What's the capacity of the heat pump. Flow rate (l/s) x DT (say 5) x 4.2 = heat transferred in kW which needs to be greater than or equal to capacity...
I find it impossible to believe that your house heats by 0.7C, or even 0.2C, in 2 minutes, unless you live in a tent. IMHO something else is causing ...
That really, really shouldn't happen and suggests that the heat pump may be well oversized or there is some other problem eg a badly set up buffer/LLH...
Either complete Bow Locks or at best a marginal effect. The amount of energy it needs to produce is fixed by your house. If you force it to produce...
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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
Sorry I thought and meant to put 'may' in, but the phon...
By JamesPa , 24 minutes ago
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RE: Octopussy cosy 6 experience
@paultheheating fair enough on the oil, that's the tena...
By mk1234 , 26 minutes ago
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The alternative would be to move some productive energy...
By EtchedPixels , 2 hours ago
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RE: Marvel Heating liquidation
@editor This is an important point. each winter, you...
By davidnolan22 , 2 hours ago
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RE: Adding data centre electricity costs to domestic energy bills?
Potentially the largest data centre hub in Europe and t...
By Jeff , 6 hours ago
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RE: Aerotherm and weather compensation
The principal cause of inefficiency if a heat pump is n...
By JamesPa , 19 hours ago
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RE: Solar Power Output – Let’s Compare Generation Figures
Very nice. we’ve been super soggy here, but rather m...
By Papahuhu , 20 hours ago
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RE: DIY powerflushing tutorial
Interesting! I toyed with the idea too. But I installed...
By bobflux , 23 hours ago
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RE: 15kw pump for 225m2 1990's house - over kill?
@seaviews Agree with the others on sequence: loft first...
By mk1234 , 1 day 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 am...
By Watcher , 2 days 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 , 3 days ago
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Coming back on subject... A shortened version of the ...
By Transparent , 3 days 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 , 3 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 , 5 days ago
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