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AndrewJ
@andrewj
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Estimable Member
Joined: Jan 8, 2025
Last seen: Apr 14, 2026
Topics: 9 / Replies: 189
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread

@kevh yes, both ends actually. They have been pretty emphatic about not dropping the Cosy 9 below 36c and I’ve been told by one techie that it can’t ...

2 months ago
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

No it doesn't: as I commented on the Cosy 9 thread, the flow temps on the Cosy systems can't be lowered enough to deal with oversized radiators and "a...

2 months ago
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

I haven't and it is definitely not as loud as being reported here. The Cosy 12 is not starting from a whisper baseline though. I haven't reported an...

2 months ago
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@toodles I believe that is the case. At warmer temps, say >4c, it's quiet, and it's definitely not as noisy as reported here for the Cosy 12. I d...

2 months ago
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

The Cosy 9 isn't exactly the strong silent type and I also dismissed most noise complaints as just people being picky. When it is cold and it's worki...

2 months ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread

@swwils I’m not too worried about things like solar gain as it’s a bit out of anyone’s control. In fact the porch now gets over 21c on sunny days bec...

2 months ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread

@agentgeorge they are oversized, except now the porch and downstairs wc which are now about right. According to the radiator schedule the kitchen is ...

2 months ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread

@toodles the LSV in the bedroom is only just cracked open and I will see how it goes. For most of the day, the room has been sat at 23.2c, up from 22...

2 months ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread

@kevh certainly I would not choose a Cosy again because it doesn't allow a low enough flow temp, doesn't give enough data points to help sort out bala...

2 months ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread

I had two radiators upsized in the porch and downstairs wc as these two rooms just never got up to temp, even with the rest of the house overheating. ...

2 months ago
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@swwils Unfortunately they give access to very little data through their app and I have no additional sensors. I have noticed real-time draw through ...

3 months ago
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@swwils On my Cosy9 when it is working hard, the blown air is noticeable at a height difference of 3m, horizontal distance of 1.5m and through triple ...

3 months ago
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