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Last seen: Sep 17, 2026
What I have definitely noticed since getting the heat pump is that I have almost no sense of what the outside temperature is; I have to look at the he...
'setback running shoots itself in the foot by somehow compromising COPs at higher OATs?' is very plausible. At higher OATs the heat pump is going t...
All noted, Im not doubting you, just trying to be certain (and hopefully help you be certain) that what you are measuring is real and representative o...
So you can get totally analogue sensors that are held on the side of the flue by a magnet. Hook up a cheap camera pointed at the sensor and feed the ...
Thanks for the further info. Are the two pumps just because one wasnt sufficient, or is there anything between them. Have you got the Mitsubishi pr...
Have you got an LLH or buffer? If so which pump speed did you reduce and which flow rate are you measuring? At moderate OAT expect deltaT to fall u...
OK 12 hours stable running should be enough to get a good reading. Can you be more precise about where the flow and return temperature sensors which...
Improvement is good. Lets explore where we are now. You should definitely be getting better than 3 at 9/35 (Can you confirm 35 measured at and by ...
Just one more thought. If you have convenient space for the 20kW cascade and your installer is paying then it possibly isnt a bad option. Most of ti...
Ok given that history they aren't going to risk under sizing. I made a couple of suggestions above. Is it really impossible to fit R290, the rules a...
For clarity there is no requirement for clearance behind (other than for airflow of course - typically 200-300mm) and you can have a window directly a...
@mars I think your commentary is very fair and balanced. I do get that suppliers are genuinely experimenting with tariffs to find out what customer...
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Degrees of Separation
Latest Posts
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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 , 11 hours ago
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Thank you @majordennisbloodnok – that means a lot, part...
By Mars , 15 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 , 15 hours ago
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RE: Missing flow temperature in Heat Geek proposal
That calculation is reasonable, output is proportional ...
By JamesPa , 18 hours 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 , 19 hours ago
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RE: Why are ASHP installs so expensive?
A not unreasonable position and it wouldn’t be mandator...
By AndrewJ , 19 hours 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 , 2 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 , 3 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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