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razz
@razz
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Joined: Jan 11, 2026
Last seen: Mar 13, 2026
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Topics: 1 / Replies: 33
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

So did I. I thought the vibrations were passing through the circulation pump into the pipes, but this resonance thing seems to happen (to a lesser ext...

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

@jamespa So the idea was to turn down the LSV in this one room, to reduce flow rate, and see if the ringing is from water/copper friction of high flow...

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

@jamespa thanks again.   I'll read the article and try to undo the balancing right now.   Also, do you think a big, super wide radia...

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

Another question for those with knowledge on the subject.So, here's the situation:1. The HP engineer came by on Friday to balance the radiators. 2. Si...

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

@bash what was the cause? How did you get it fixed?

1 month 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!

I found this thread on reddit:Does this seem like something I should ask from Octopus?

1 month 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!

Yes, that's right. I guess it could really just be coincidental that the hammering started at the same time as the HP install. Maybe something got ...

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

Also, reinstalling a boiler just doesn't seem wise in the current climate, and the trajectory of technology. I imagine I'll have to install an electri...

1 month 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 Thanks for the heads up on the boiler vs HP radiator sizing. Not having to replace the radiators again would be a big help.You've got the rig...

1 month 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!

@dedwards I'm glad to hear some your issues have been resolved.Unfortunately none of my issues have been resolved so far. After the umpteenth visit fr...

1 month 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 this has been my experience as well.

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!

The buzzing is back...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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