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razz
@razz
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Eminent Member
Joined: Jan 11, 2026
Last seen: Feb 17, 2026
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Topics: 1 / Replies: 23
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@harriworld this has been my experience as well.

2 weeks 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!

The buzzing is back...

3 weeks 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!

Yeah, the 20.8C holds in the hall. Currently, the hall is at 20.8C, the bathroom is 24C (but probs cos people have been using it, and its a small room...

3 weeks 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!

This is the vision I bought into when I signed the contract for the heat pump.Instead it's the exact opposite, and I'm paying a premium to be colder, ...

4 weeks 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!

The rear extension (living room/diner/kitchen) has a lot of glass, plus a 'roof lantern', so it gets cold in the winter, and VERY hot in the summer. S...

4 weeks 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!

@jamespa I was told by the octopus engineer to set the target temp to 21c, and it's not getting to 21. It's been "warming up" since midday and still n...

4 weeks 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!

@jamespa Alright, I'll try to balance the living radiator myself tomorrow. Thanks all for the tips. Hopefully that will help.Any idea why the hallway ...

4 weeks 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!

@andrewj Thanks for the info.I was told by the Octopus people that the primary pod should be in the part of the house with the most consistent temps. ...

4 weeks 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!

@l2jad I had a call with someone from MCS last week who called to check in on the status of the install. Told me to call them if I wasn't happy with t...

4 weeks 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!

So I got an email from Octopus today saying they added a software update to my heat pump which should reduce the noise. The Octopus engineer has told ...

4 weeks 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 Another heat pump engineer/installer from Octopus came by. He said, the reason for the use of a 4 port buffer is to get "hydraulic seperation"...

4 weeks 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!

@l2jad Glad to hear it. Hope it'll be sorted for us all. BTW, did they install a 4 port buffer or a 2 port volumizer for your system?From an earlier c...

4 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
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