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JamesPa
JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Feb 23, 2026
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Topics: 21 / Replies: 4291
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

When you say 'struggling to get up to temp' what do you mean? The default design temp for hallways is 18 so if its reaching that it is getting up to ...

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!

I just want to repeat and emphasise that, in simple terms, you have to choose between radiator balancing, in which the householder must currently play...

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 following relates only to the temperatures, the noise matter is a separate one on which I wont comment.   OK so the only actual issue ...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: High Temp Heat Pumps for fast warm-up of house

If you insist on this functionality then your principal options are, so far as I can see: 1. Get an R290 heat pump which is about the right capacit...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: My NIBE ASHP Nightmare: No Commissioning, High Bills and a Hostile Installer

er, if you do this how will the heat pump ever know to switch on? The obvious thing is to tie it to the heat pump's water pump so it switches on whene...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Failed install (initial SCOP1.8), clueless installer compounded by poor support from Mitsubishi. Help needed desperately!

Here are the BUS rules, note in particular 9(d) Part L of the Building regulations here is also relevant, particularly L1b To be brutally hones...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Failed install (initial SCOP1.8), clueless installer compounded by poor support from Mitsubishi. Help needed desperately!

I am sorry to hear about the problems. My advice to you would be focus on a small number of provable issues to avoid any possibility that you are per...

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

@harriworld Who is TJ? In answer to your question it depends on what the actual problem that the buffer is trying to solve is! (a) If the underl...

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

Yes but... If the effect of the buffer is to allow the system to 'get away' with a lower flow rate to the emitters (and thus higher DT for any given...

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!

I think its worth turning this question on its head in the case of Octopus and worth asking: notwithstanding the apparent limitations of their install...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Gaslighting in the heat pump industry – has anyone else experienced this?

@editor @gruff2001 FWIW mine was also audited. The problem I perceive based on my experience is that (it appears) that the installer has to identi...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: High Temp Heat Pumps for fast warm-up of house

I don't know exactly how long it takes to heat up (and to specify I would need to specify conditions) but in very general terms its 24 hours+ for the ...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
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