Last seen: Feb 6, 2026
@agentgeorge these are just the declared figures. I need to check but I think I have seen better real world results especially after the August update...
@agentgeorge 35C ScOP 4.36, 50C ScOP 3.6, 65C ScOP 2.99.
@kevh it's updated. They do listen. I've always been confident they will get there. 👍 I still think it's been very cost effective.
I've got a fairly large volume system (12+ rads and a voulmiser, so probably well north of 100L) and it doesn't seem like my cosy 9 can maintain dT wi...
@andrewj Have you considered just running it on a fixed flow temp? At the lower end there isn't really much to even compensate, your house must be wel...
@jamespa Its an emerson copeland, at least what I saw when they installed mine.Apparently the API can set a static flow lower than the app can, but I ...
@andrewj mine seems to select a totally different control strategy f you put the temp up to an unachievable temp, as soon as it can't maintain it it s...
@harriworld what have the confirmed? Anything? 😬
@kevh hopefully they will release an advanced controls mode. 👍 Or a "quiet mode" that does what you want.
@andrewj mines the opposite, louder than normal 😂
@andrewj there are loads of reasons 35C might be a practical limit. They need to look after oil return and maintain a minimum pressure ratio. At very ...
@toodles they were great when combined with really, really, large UFH systems.
Latest Posts
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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...
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RE: High Temp Heat Pumps for fast warm-up of house
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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
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By DavidB , 7 hours ago
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RE: Daikin 6kw setup with Dixell controller
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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...
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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 ...
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
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RE: External wall insulation - your experience
To be clear, my experience was very positive. The journ...
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@foxesfan Re: ‘Servicing’ as @editor has covered in his...
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RE: A Smarter Smart Controller from Homely?
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RE: Battery sizing - How low can you go!
It seems I am seeing something similar to what you do, ...
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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...
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RE: Bosch CS5800i 5kW - Experience So Far
@majordennisbloodnok While getting Home Assistant runni...
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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...
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RE: Air source heat pump roll call – what heat pump brand and model do you have?
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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 ...
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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, ...
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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 ...
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RE: Setback savings - fact or fiction?
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