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Last seen: Mar 25, 2026
@sheriff-fatman Thank you for the additional information. Your system seems to be very similar to mine and it produces very similar results. I have us...
@jamespa Thank you, I have validated the temperature sensors and found them to be accurate. I am interested in suggestion c) that there are specifi...
@f1p Thank you. I have specifically asked Mitsubishi about PWM control, they have told me that it isn’t available if you have a third party cylinder. ...
@jamespa Thank you for the reply. I recognise that the data that I am using is not very accurate but it is good enough to show that the efficiency of ...
@f1p Yes it’s a 25% change in Delta T and hence a 25% change in output
@f1p I only have 1 pump the max flow is about 25 l/min, here's a table including flow rate, OAT, COP etc
@f1p That's a large difference in performance to my system
@jamespa Please would you explain In that case no surprise COP is only 3.1 if my understanding of autoadapt is correct" My understanding of auto adapt...
@f1p 17 Radiators with a combined output of 10.2kW at a delta T of 25C, i.e. flow of 45C room temp of 20C. Water heating represents about 5% of my o...
Correctly attached 28 Feb this time
I'll try again that was for 5 Feb MEL Pump App - Heat Pump Detailed Report
@f1 p. If I have done this correctly it should give the data for 28 Feb which has no defrost cycles, an OAT of about 7C and very stable operation ...
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
Hush mode now released. I've not tried it yet. Should b...
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RE: Air-to-air heat pumps - best models and installers
Are you creating a whole new category for A2A?
By ASHP-BOBBA , 1 hour ago
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RE: A2A vs A2W: Which Heat Pump Would You Pick?
There isn’t as far as I know, @djh, but you’re welcome ...
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RE: Can anyone explain the following behaviour with a Grant Aerona 3 R30 / Smart Controller?
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RE: Forum updates, announcements & issues
Thank you Mars for all your dedication to improvements;...
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RE: Who do I complain to about a poor ECO4 installation, can anyone advise?
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RE: Selling 2 x Kensa Shoebox 7kw GSHP (New)
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No buffer or low loss header Grant controller in sens...
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RE: Are We Sleepwalking Into Another Race to the Bottom?
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RE: Anyone concerned about GivEnergy?
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RE: Plug and play solar. Thoughts?
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RE: British Gas vs Octopus Energy vs Heat Geek vs EDF vs Aira vs OVO vs EON.Next vs Boxt
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RE: IVT greenline HT Plus E - Circulation Pump Constantly On
Welcome to the forums. Irrespective of which brand yo...
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RE: 7.5kW Heat Loss, But Quoted a 10kW Midea. No Re-Pipe, No Buffer Tank. Does This Add Up?
Oh, how I love these old scientists!I'm in with your 5 ...
By LeJamaisContent , 2 days ago
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RE: Jokes and fun posts about heat pumps and renewables
@jamespa Someone who is not easily phased I suppose.
By Toodles , 3 days ago
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@downfield Once OE had removed our gas meter and capped...
By Toodles , 3 days ago
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Living with a Low Loss Header (Or Measure For Measure, it’s All About the Pump)
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RE: What is the main ‘dictator’ of Agile’s unit price?
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RE: The Reality Behind a Failed Heat Pump Installation – and an IWA Insurance Rejection
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RE: Solar Power Output – Let’s Compare Generation Figures
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@judith, glad you found the story interesting. On eff...
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