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Last seen: Sep 17, 2026
I think its worth turning this question on its head in the case of Octopus and worth asking: notwithstanding the apparent limitations of their install...
@editor @gruff2001 FWIW mine was also audited. The problem I perceive based on my experience is that (it appears) that the installer has to identi...
I don't know exactly how long it takes to heat up (and to specify I would need to specify conditions) but in very general terms its 24 hours+ for the ...
I dont, because I dont turn it off unless Im going away for several days, and in that case the technology to schedule a timed restart (and if necessar...
Before I got a heat pump I turned down my gas boiler flow temperature from 70 to 50 which was the lowest it would go. The result was a much more comf...
OK. What Im seeing looks fairly normal TBH: 1 start per hour is good (1028 on off cycles in 1303 hours); there is no evidence of short cycling Un...
In general pure LWT mode will be more efficient because it means you are operating at the lowest flow temperature. It may well, depending on house, a...
Wow, that sounds like fun. There is another thread where someone with a Hitachi heat pump (featuring a more conventional vertical fan) describes a si...
@davidb Further to my previous post one further comment I would make is that 300l system volume is not consistent with 7 radiators. Unless you have a...
Since May 2025 it no longer a requirement in England to benefit from permitted development rights (ie planning consent without having to make a planni...
@davidb Once again I agree with Adrian. Houses have memory and different bits cool at different rates. So for example (this is just one mechanism...
I agree with the comments made by @adrian both about the fire and the DHW. You should also bear in mind that, with a low loss house, COP isnt so impo...
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Latest Posts
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RE: Heat Pump deployment statistics: June 2026
@editor I think our differences are subtler. I agre...
By JamesPa , 2 hours ago
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Thank you @majordennisbloodnok – that means a lot, part...
By Mars , 3 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 , 3 hours ago
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RE: Missing flow temperature in Heat Geek proposal
That calculation is reasonable, output is proportional ...
By JamesPa , 5 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 , 6 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 , 6 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 , 2 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 , 2 days ago
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RE: Vaillant Arotherm – Using Heating
@l8again Mine is typically using 11w including the i...
By Batpred , 2 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 , 3 days ago
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