Last seen: Feb 4, 2026
Hi I’ve reposted the two contrasting defrosts from the above post and re labelled them so the contrasting defrost periods can be compared. They are de...
Hi @robs Can I ask you to explain what you see as the energy attributable to the defrost and defrost Recovery. To my mind there are some energy act...
@jamespa yes I see what you mean. I think what was on my mind is how to read the impact of the eventual drop in return temperature water. What I’ve n...
I see things have moved on, all of a sudden and Rob has introduced interesting variants of defrosts across various brands. im glad the topic of lag ...
Interesting, I have highlighted the possibility of hidden energy that may not be accounted for during recovery, as listed, including contained in th...
@cathoderay I kind of guessed you might come back with the data validation route. The problem with that route is that it is only as good as the under...
It looks like there’s some good discussions on applying insulation which can’t be a bad thing @majordennisbloodnok and @cathoderay. Regarding out top...
Hi @majordennisbloodnok, I don’t think I have a different view than yours here. Im very passionate about listed buildings. I’m just pointing out that ...
@cathoderay yes I agree, listed buildings may present challenges depending on what is a particular listed feature. Importantly, of course, it’s also t...
@old_scientist that’s quite an interesting story and I agree there are some serious issues when the insulation is installed incorrectly. And possib...
In my opinion insulated walls are not a “nice to have” option, rather it is necessity. Insulation of older housing stock must be seen as an absolute...
Here is that Samsung link posted by @old_scientist
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RE: If a heat pump can only heat DHW to 50C then what? Issue with 18KW Heliotherm heat pump
Hi, Nothing yet. I've asked customer to measure flow...
By errmm , 4 hours ago
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RE: High Temp Heat Pumps for fast warm-up of house
I don't know exactly how long it takes to heat up (and ...
By JamesPa , 5 hours ago
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RE: Need help maximising COP of 3.5kW Valiant Aerotherm heat pump
OK. What Im seeing looks fairly normal TBH: 1 start ...
By JamesPa , 6 hours ago
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RE: Vaillant Tech Support Flagged Low DT: UFH Return Cold, Suspected Zero Flow
@editor thanks for the tips which I will try before cal...
By DavidB , 7 hours ago
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RE: Daikin 6kw setup with Dixell controller
@jamespa Many thanks for your reply, a very detailed an...
By CraigH , 8 hours ago
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RE: Exploring the role of alternative clean heating solutions - Government Consultation
Despite reservations, I found some time to respond to t...
By Rusty , 8 hours ago
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RE: New Vaillant aroTherm Plus in black - When will it come to the UK?
@crankplus, nope, still not, and I've followed up with ...
By Mars , 8 hours ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
@agentgeorge Probably, but temperature change at -10 ha...
By AndrewJ , 9 hours ago
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RE: External wall insulation - your experience
To be clear, my experience was very positive. The journ...
By Batpred , 11 hours ago
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@foxesfan Re: ‘Servicing’ as @editor has covered in his...
By Toodles , 11 hours ago
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RE: A Smarter Smart Controller from Homely?
@benson No idea why mine doesn’t work, all I see on ...
By Papahuhu , 12 hours ago
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RE: Battery sizing - How low can you go!
It seems I am seeing something similar to what you do, ...
By Batpred , 13 hours ago
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RE: Gaslighting in the heat pump industry – has anyone else experienced this?
Don’t know if this is relevant to this thread, but my A...
By Gruff2001 , 13 hours ago
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RE: Bosch CS5800i 5kW - Experience So Far
@majordennisbloodnok While getting Home Assistant runni...
By Steelbadger , 1 day ago
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RE: MCS - BS EN 12831-1:2017 – Heat Loss Survey
Since May 2025 it no longer a requirement in England to...
By JamesPa , 1 day ago
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RE: Air source heat pump roll call – what heat pump brand and model do you have?
Forum Handel @jancold Manufacturer: Daikin Model: E...
By Jancold , 1 day ago
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!
@harriworld it was roughly 3am for an hour as that’s ...
By L2jad , 1 day ago
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RE: Hoped for improvements not being realised on my Mitsubishi heat pump
I have been wondering that myself. The fact is that, ...
By JamesPa , 1 day ago
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RE: Filtering Tap Water – Share Your Setup for Cleaner, Better-Tasting Water
I remember when I was in my early 20s I was introduced ...
By Majordennisbloodnok , 1 day ago
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RE: Setback savings - fact or fiction?
But if it is recorded an an integer, which it seems it ...
By cathodeRay , 2 days ago

