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Last seen: Sep 18, 2026
Really sorry to hear this, I was expecting no change not a deterioration and I must therefore eat humble pie following my comment that swapping a smal...
made of brass not plastic, proper square hole same shape as bleed screw. I did a quick search and they seem relatively rare, most seem to be a (pres...
Definitely. 8C DT is higher than the default design DT for most heat pump systems which is 5 This has the effect of reducing the average flow temp b...
Thats a great analysis and |I doubt any heat loss calculations adequately deal with this. Put another way there is an (probably) unaccounted for loss...
Thanks. I had forgotton that particular feature. I presume the call for heat switches secondary pumps on/off not the heat pump. All of this is goi...
Its the heat pump, more specifically the compressor, cycling on/off quickly. The most important parameter is the on time, anything less than about 1...
It will inevitably. If your heat pump capacity is perfectly matched to your house loss you can expect the heat pump to cycle from an OAT of roughly 1...
re 'enforced night mode running constant at 60%' are you saying that the heat pump was previously forced on (at 60% modulation) at night. If so thats...
With the expanded view you can see it ticking along at about 300W other than during the DHW reheat and between 4.30 and 5am. The spikes are very narr...
OK, couple more questions At these relatively mild temps, how certain can you be that its not just a WC setting problem that would be resolved by le...
Hmm The spikes are very short (so quite possibly very little energy and thus of little significance) but too low to be just the water pump....
I would say yes. Have you got a buffer/LLH and secondary pump. How is is set up (thermostat? Weather compensation?). Are your emitters completely o...
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Degrees of Separation
Latest Posts
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RE: Why are ASHP installs so expensive?
@rob-of-york I’m firmly with you on this, and it’s a co...
By Mars , 2 hours ago
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RE: Heat Pump deployment statistics: June 2026
To my eyes, sat behind all of this is a basic policy ma...
By Temperature_Gradient , 18 hours ago
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Thank you @majordennisbloodnok – that means a lot, part...
By Mars , 22 hours ago
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We’ve just passed 20 million forum views! 🎉
It's official. The Renewable Heating Hub forums have of...
By Mars , 22 hours ago
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RE: Missing flow temperature in Heat Geek proposal
That calculation is reasonable, output is proportional ...
By JamesPa , 1 day ago
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RE: Recommendations in Ely (Cambs) area for Full setup checks on Nibe HP setup for House.
Have you looked at the Nibe website? They list their ap...
By Lizzie , 1 day ago
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RE: Who's your electricity provider and what's your tariff?
@batpred When the raw material input has increased in c...
By Papahuhu , 2 days ago
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We kept ours and Heat Geek would have been in touch if ...
By Batpred , 3 days ago
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RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
@ian-s I would encourage you to have a conversation ...
By Rob of York , 3 days ago
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RE: Is it the house or the equipment?
Thanks @jamespa The last hard to fix draughts in the...
By springswood , 3 days ago
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RE: Vaillant Arotherm – Using Heating
@l8again Mine is typically using 11w including the i...
By Batpred , 3 days ago
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RE: Next steps on my ASHP journey: Radiators and Pipework
If you have a flowmeter and two temperature probes, the...
By bobflux , 4 days ago
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RE: Siting of the external sensor on a heatpump
@jamespa Absolutely. Even if the same mistake was mad...
By Batpred , 4 days ago
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