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Mars
Mars
@editor
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Illustrious Member
Joined: Feb 11, 2021
Last seen: Apr 26, 2026
Profile Activity
Topics: 356 / Replies: 4156
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Reply
RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

And a buffer tank doesn’t even guarantee minimum flow. We had a buffer and still suffered constant flow errors. Our system needed roughly 30 l/min and...

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

@jamespa, fair point about Octopus.

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

That’s honestly wild. I had no idea it worked like that. I’d always assumed MCS selected a property at random from an installer’s recent jobs. If the ...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Failed install (initial SCOP1.8), clueless installer compounded by poor manufacturer support. Help needed desperately!

@bart, it's utterly nuts what you've been through! This is a good place to keep the conversation going. Do you need someone to come out and do a ...

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

 

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

@gruff2001, your experience exposes the MCS audit for what it truly is… a shallow, perfunctory box-ticking exercise masquerading as serious oversight....

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

@razz, unfortunately ‘hydraulic separation’ has become a comfort blanket phrase for poor installers. It’s not inherently evil, but it’s also not a fre...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: If a heat pump can only heat DHW to 50C then what? Issue with 18KW Heliotherm heat pump

@errmm, have the original installers not come out to have a look and find the issue?

3 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: New Vaillant aroTherm Plus in black - When will it come to the UK?

@crankplus, nope, still not, and I've followed up with Vaillant. Their lips are sealed. But wonder if anyone else has heard anything.

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Vaillant Tech Support Flagged Low DT: UFH Return Cold, Suspected Zero Flow

@davidb, if the flow has drifted back to near-closed and the adjuster now isn’t doing anything (bearing in mind that I'm not a plumber or heating engi...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Vaillant Tech Support Flagged Low DT: UFH Return Cold, Suspected Zero Flow

@davidb there isn’t really a universal 'rule of thumb' number for UFH flow rates, which is why I was careful not to present 1 l/min as the answer. In ...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: If a heat pump can only heat DHW to 50C then what? Issue with 18KW Heliotherm heat pump

@errmm, curious to see if there have been any updates on this project. Please let us know.

3 months ago
Forum
Domestic Hot Water & Cylinders
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