Last seen: Jul 25, 2025
@jamespa - interesting! I have made a small change, changed the degree minute calculation from (IAT -OAT) to (baseline - OAT) with a baseline of 15.5,...
@jamespa - and here's the data:
Can and will do. I'll post the minute data for the last two weeks shortly. The calculations I have explained before but I expect that signal may have ...
There certainly are discrepancies, but I am fortunate that for the energy in I can measure them, as I have an external heat pump dedicated kWh meter. ...
For sure, that is the gold standard, but you can get some Ecodan data, see posts by @kev-m, though obviously it comes, like my data from a Midea unit,...
I do have the data, as you know, all you have to do is ask! According to my Mark 1 Eyeball Aggregator, the IAT was on average about one degree less ...
Sorry if you were confused, it is entirely my fault, I was looking at one image (last week) and had posted another (last 48 hours). The last week look...
I can't answer all of your questions but here goes for some of them: (1) I am not sure which delta you are referring to - rad to room or LWT/RWT. Th...
The chart was in my previous post two above the last one, but the website pagination has put it on a previous page. Here it is again: ***edit:...
Do setbacks save energy without compromising comfort? The original question... Given the above chart ***edit: this is not the image I meant, see bel...
A sorry sight for sore eyes - the last 48 hours data: Dominated by defrost cycles, appalling COPs and a slight but steady decline in IAT - hea...
Well well, here's the definitive answer as to whether Midea heat pumps run the fan during defrosts (apologies for not editing the titles etc, this is ...
Latest Posts
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Delighted to hear this went well. It looks very neat ...
By JamesPa , 6 hours ago
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RE: No-code, plug-and-play monitoring for your heat pump
The issue with the Grant is that you have to wire direc...
By Grantmethestrength , 10 hours ago
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RE: Is this just haze or something more?
I am not a scientist nor a meteorologist and I know the...
By Toodles , 10 hours ago
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RE: Benefits of an extra horizontal loop for GSHP
It will improve performance, but by how much depends on...
By Brendon Uys , 15 hours ago
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RE: The good, the bad and the not that great – my heat pump installation
Said I would pop back with a update. Only Mr Jesus h...
By Burtis , 1 day ago
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RE: Buffers, hot water and cooling
Thats presumably heat pump DT, what about radiator DT a...
By JamesPa , 1 day ago
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RE: Who's your electricity provider and what's your tariff?
@chandykris Exactly the same here. We now have 13.5kWh ...
By Old_Scientist , 2 days ago
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Compressor and Evaporator Stratification
I have had a few issues with my Hitachi spilt heatpump ...
By trebor12345 , 2 days ago
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RE: Wood burner with ASHP - direct air?
This depends on the size of your wood burner and size/t...
By Lucia , 2 days ago
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RE: Difficult positioning of air source heat pump
@rikiarn It's a not a buffer it's a volumiser which is ...
By Lucia , 2 days ago
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RE: Is your heat pump insured?
To make things clear, lots of insurance companies cover...
By Lucia , 2 days ago
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RE: Boxt Heat Pump Installation Experience
@adrian any updates since installation? How is it perfo...
By Ashfp , 3 days ago
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RE: Say hello and introduce yourself
Hi @seatonian - Yes, I know Seaton, and I have the Nat...
By Transparent , 4 days ago
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@seatonian got your email. Will connect you with a reco...
By Mars , 4 days ago
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@downfield and @toddles, this isn’t in the settings cur...
By Mars , 6 days ago
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RE: Homely launched for Grant Aerona ASHP control
I haven't bought the Aerona Smart Controller (£700!) bu...
By Prunus , 6 days ago
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RE: Antifreeze top up for my heat pump - is this a rip off?
For the record, Grant supply ethylene glycol for their ...
By Prunus , 6 days ago
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RE: Compressor attempts start but fails - Nibe Fighter 2005 8kW
@skyefarmer amazing. Well done!
By Mars , 7 days ago
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RE: Air source heat pump roll call – what heat pump brand and model do you have?
Ebac 5kw - Monobloc R32. Developed and made in UK - Mit...
By marcinwloch69@gmail.com , 1 week ago
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RE: Is a Valliant Inline 6kW heater a BUS buster?
Just another thought - it might be worth thinking about...
By JamesPa , 1 week ago
