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Last seen: Oct 21, 2026
@jamespa - I am continuing to collect data, which will only apply to my compromised ungeneralisable setup in the conditions in which it was collected,...
@kev-m - I think you may be onto something, an average hiding detail. Here's a zoom in on three defrosts over a two hour period on a recent cold morni...
I have not taken it as a personal attack on me, instead I am trying emphatically to say that constantly pointing out the obvious increases the noise a...
@jamespa - interesting. The confidence interval overlap is indeed very small, and may or may not disappear with larger sample sizes. At the moment the...
I do of course by and large agree, much (but definitely not all, by a long shot) is relevant, because it turns out that to answer the original questio...
I agree, and every now and then I as the thread starter try to remind folks what this thread is actually meant to be about (eg an hour or so ago I wro...
@ The string 'defrost' does not appear to exist in the Midea Engineering Data manual. I have plotted the 'norm' power outputs over the range of OATs...
At the moment, it seems to me there is not enough second thoughts going on, and instead there is a lot of noise repeating stuff we already know - in s...
As I thought, but that is the least accessible place, and invasive approaches are not an option.
DT might actually be the harder one, depending on how and where you measure it (and bearing in mind I have a PHE). The flow rate has two things that m...
If this is correct, then this is compressorgate! Seriously, though, I thought the engineering data was supposed to include the effects of defrost cycl...
Yes, on the left hand side it peaks at just under 8kWh (which is 8kW over that hour, unless I've totally lost the plot). Clearly this is much closer t...
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Latest Posts
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RE: 15kw pump for 225m2 1990's house - over kill?
@carpenterstation you have tandem heat pumps?! Sorry I...
By GrahamF , 21 minutes ago
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RE: How quickly would you want/expect heat recovery to take from setback?
@andrewj I used to have a similar strategy but wit...
By TechnoGeek , 23 minutes ago
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RE: BT cuts you off, Plusnet blames Openreach... welcome to “seamless” broadband switching
@andrewj heartened to know that. Blue light on the rout...
By Mars , 1 hour ago
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RE: The Changing Jet Stream Could Challenge UK Air Source Heat Pumps
@susannasaunders, reading your contribution has made me...
By Mars , 1 hour ago
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RE: Safety study for plug in batteries out to tender - looks like Q3 2027 at best before legal
I recently saw posts and ads from FUSE and they were in...
By Mars , 2 hours ago
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RE: Indevolt Batteries UK Support & Info Thread
@editor Manually setting the charging times and rates o...
By dansus , 10 hours ago
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RE: How much of your renewable and home setup would still work if the internet went down?
Ours is similar to James, but with a few optional tweak...
By Batpred , 13 hours ago
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RE: Renewables & Heat Pumps in the News
Yes, this is a swiss and german standard I believe, Vai...
By Batpred , 13 hours ago
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!
@editor FWIW my problem was resolved, eventually, after...
By BigFish , 20 hours ago
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My heating has been off and DHW on throughout the summe...
By DavidAlgarve , 23 hours ago
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RE: Anyone concerned about GivEnergy?
The GivE forum seemed to have survived the collapse of ...
By downfield , 23 hours ago
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RE: Cooling/heating with one unit
@mrkfm The Solo has a small capacity and only suitable ...
By dgclimatecontrol , 1 day ago
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First you need to know how much thermal energy you'll n...
By bobflux , 2 days ago
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RE: Renewable Heating Hub Homeowners' Q&A Podcast
Come for the low-carbon homes. Stay for George Clarke’s...
By Mars , 3 days ago
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RE: How should the Boiler Upgrade Scheme be reformed?
Not quite, regular A2W heat-pumps need a load of extra ...
By Temperature_Gradient , 4 days ago
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