Last seen: Aug 25, 2025
In fairness I would expect the COP to change, because you are working the heat pump harder in setback (which is the whole basis of the argument that s...
@cliffhanger suggest you reread my post above, I edited it after you looked at it. I found a video which helps a bit, but Grant do seem to have come ...
@cliffhanger I have a pump with the 'factor' curves and, once you understand them they are easy to operate, easier in fact than the '4 point' system...
As others have implied, the latter (this is the most important thing to understand about heat pumps). In short the procedure is: Set all your...
Definitely - I didnt realise that they had a stake in the house in warehouse. Octopus also have access to 'big data' from their installed heat pumps...
With his permission I did some analysis on the plots of 'similar days' posted by @cathoderay a few posts ago. The most important thing that comes o...
The heating curve specifies a higher LWT at low OATs, and a lower LWT at higher OATs. Thats the whole point of the heating curve - it varies the LWT ...
It is indeed a good question. The purpose is always said to be to ensure that there is sufficient water in the system to yield sufficient energy to...
Mine are also upstairs because I upgraded them before I realised how much the heat pump industry overestimates house losses. Still not a problem alth...
I confess I had to look up 'ceritus paribus', but having done so it is the problem with almost anything to do with domestic heating and heat pumps (po...
The deviations can be handled by a) the lockshield valve. this restricts the flow rate through the rad in question which increases the deltaT for ...
Latest Posts
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RE: Octopus replacing the fixed 15p/kWh export rate with a market tracking one
@old_scientist Thank you, that makes sense and I've re-...
By TRBob , 22 minutes ago
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RE: Heat Pump Books For Beginners – Bodge Buster & From Zero To Heat Pump Hero
The Ultimate Guide to Heat Pumps is less than a month a...
By Mars , 54 minutes ago
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RE: Rodents! A word of warning for heat pump owners
@tim441 Or as they didn’t quite say in the space travel...
By Toodles , 6 hours ago
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RE: Mitsu Wireless Controller and MelCloud
Update: I have found that the contractor had changed on...
By DavidAlgarve , 18 hours ago
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RE: Air source heat pump roll call – what heat pump brand and model do you have?
@editor Hi Mars, We have just installed a Grant Aerona...
By GrahamF , 18 hours ago
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RE: Sanity check please. Battery storage and inverter sizing.
There are MCS guidelines about how close to the edge/ri...
By Old_Scientist , 22 hours ago
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RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff
I estimated our usage on the following basis. The mos...
By Old_Scientist , 23 hours ago
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RE: Why so many sigenergi installer recommendations?
It’s a really simple answer, GivEnergy. Installers ...
By SAEnergy , 1 day ago
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@editor Something changed in this last 12 months, they ...
By ASHP-BOBBA , 2 days ago
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RE: Ecodan & MelCloud scheduling
I put the above question to Mitsu UK at the sme time as...
By DavidAlgarve , 2 days ago
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Thanks for the heat geek info. I've fitted my own heat ...
By bontwoody , 3 days ago
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RE: Does anyone have experience of a smart water meter?
Just to give a sense of scale, I've used the CCW water ...
By Majordennisbloodnok , 3 days ago
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RE: Powerwall 3 or Myenergi or something else?
We have a Tesla Powerwall 3, recently installed, so I m...
By Old_Scientist , 4 days ago
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RE: Mitsubishi PAR-WT60R-E Wireless Controller installation
@morgan They have been paired once but it was thought b...
By DavidAlgarve , 5 days ago
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RE: Isolating the system for a planned power cut
A great many ground-mounted local substation transforme...
By Transparent , 5 days ago
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RE: Heat Pump Servicing & Maintenance – Good Value or Rip-Off?
Having bit the bullet and paid £250 for a service, our ...
By Old_Scientist , 6 days ago
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New heat pump heating system underperforming in Italy... Advice needed!
hi all, first post! I've just renovated a house in sout...
By robinlawrie , 6 days ago
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RE: Anyone still weathering it out with Agile?
I went to Agile when I had solar installed July last ye...
By NJT , 7 days ago
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RE: Say hello and introduce yourself
Whilst you're busy installing services (pipes and wires...
By Transparent , 1 week ago
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RE: New Vaillant aroTherm Plus in black - When will it come to the UK?
@editor I know it was formally announced at Ish the oth...
By PatrickVito , 1 week ago
