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Last seen: May 17, 2026
@andrewj I couldn't imagine living in my house at the temperature your seeing, mines set at 20.5C for a comfortable environment downstairs and 19C ups...
@swwils good results supporting running heat pumps at lowest FT that will keep the home warm and not overheat it @andrewj are you able to adjust you...
Has anyone seen a graph of efficiency vs Flow Temp. Trying to achieve FT of 45C when it’s-12C outside sounds like a step to far. with my setup, ive no...
@kevh they certainly have updated the App to allow 45C, you can see the screen grab I di a few days ago shows 50C as the lowest. I’ve changed mine t...
This has been on the App front screen for a few weeks, so being bored 🙂 decided to click the link and read all about how your Cosy should've been se...
@kevh you cant change the 50C on a Cosy install, if you try, it will let you type 45, then you get a red warning that 50 is minimum. i wonder if you...
@swwils What i deduce from all the comments in this forum is that hardly any installation has been setup. Mine by Octopus was just a simple spec, fit ...
@editor I can detail the concise version of events, if anything strikes a chord I can elaborate initially declined to quote, which I deduced by chan...
@andrewj found this article by heart geeks it touches a lot of topics, WC is as you described, a line or curve between 2 OATs where flow temperat...
@kevh todays COP is 4.02 (0.5-6.8C), 2 days ago was 4.50 (5.5-8C) The lower overnight temperature has affected the performance, likely more defrost ...
The App says it choses the top temperature when OAT is above 12C, my system is running at 36C today and its 6.8C according to Cosy HP. Logic would sug...
Latest Posts
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RE: Heat Pump Manufacturers Recommending Buffer Tanks
@tony-stolz, I think @jamespa has already covered the h...
By Mars , 11 hours ago
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RE: Heat Pump Overpromising – What Were You Actually Told Before You Bought?
@jamespa that’s actually a really interesting observati...
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RE: How many people are happy with their ASHP and do you believe them?
Good luck, I spent a couple of hours and, whilst I foun...
By JamesPa , 12 hours ago
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RE: Heat Pump Operation in Summer - Valliant 7kW
I do the same: cool my large buffer (3000L) to 10C, pum...
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@editor "The interesting bit is that many modern invert...
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RE: Ecodan & MelCloud scheduling
With the prospect of warmer weather this week, I brough...
By downfield , 22 hours ago
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RE: A2A vs A2W: Which Heat Pump Would You Pick?
I reached out to MCS directly last week on this and her...
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Mentally you have to separate the ac side and the DC si...
By JamesPa , 2 days ago
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RE: Help me keep the faith with my air source heat pump installation
My heating developed a really severe case of noise and ...
By JamesPa , 2 days ago
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!
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Hi, Does anybody have experience with Heat Geek insta...
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I will soon be struggling. Admittedly it is the summer,...
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RE: Indevolt Batteries UK Support & Info Thread
Not known yet. I've asked a local Councillor to follo...
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Hard to tell but I think I have placed the arrow on wha...
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