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LivingGreen
@livinggreen
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Joined: Jan 29, 2026
Last seen: Feb 7, 2026
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Topics: 0 / Replies: 7
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@editor I struggle a bit with the logic of buffers but I think the minimum flow rate needed by the cosy 12 is 26 or 34l/min and there was a fear peopl...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@harriworld it's better but hard to tell so far how much better. I'm really not going to believe a fix until we get some cold weather to test it, need...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

Just been told there's a firmware update coming for all units this week - some units may already have it

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@harriworld not sure if it would help but we've hired one of these: to try and reduce the impact on the neighbours while we wait for the noise to...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@editor yep cosy 12 too Noise issues raised at the start of January. Had a firmware update which reduced it from jet engine(!) but still experiencin...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@editor did you have any luck with TJ on the noise?   I completely feel @l2jad pain. We've been debating all hours how do we unruin our dream...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

Another loud Cosy 12 install here. We're confident the spec is wrong and not what is being seen in reality. We have a complaint in but so far being to...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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