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Octopus Cosy 6 launched

 
Air Source Heat Pumps (ASHPs)
Last Post by Wobby1 6 months ago
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 ChickenBig
(@chickenbig)
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Topic starter 14/09/2023 3:17 pm  

Octopus Energy unveils new smart heat system ‘Cosy Octopus’ at Energy Tech Summit

Sounds interesting, even if specs are TBD.

“The combination of a high-temperature heat pump (as hot as a gas boiler), Octopus smart tariffs and room sensors across your home doesn’t just open up cheaper clean heating - but more comfort too.”

Interesting to see this going against the slow-and-steady running philosophy.


   
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 AllyFish
(@allyfish)
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15/09/2023 4:12 pm  

I've been in discussion with a few people today on this one. 75degC max LWT seems to fly in the face of perceived wisdom and best practise of lowest possible maximum LWT for highest SCOP. There's only so much enthalpy in the ambient air, and to raise LWT higher requires more input energy to the compressor and more work done by the compressor. HT heat pump for DHW? Yes, absolutely. No need for immersion for Legionella cycle if you can supply DHW at 65degC to charge a cylinder up to 60degC. I do fear whether this is a [forgive the crude phrase] "pile 'em high and sell 'em cheap" pitch by Octopus. Installation cost is a barrier to roll out of ASHP, but an even bigger and unwelcome (sometimes unwitting) barrier is an unaffordable to run heating system. However efficient the Cosy 6 unit is, it'll be consuming a lot more electricity to generate water at 75degC than 55degC, and at current average energy prices be more expensive to run than a gas boiler. Octopus may have special tariffs for the product, but they are not immune to wholesale energy cost volatility, and won't be in the market to subsidise operating costs.


   
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DougMLancs
 DougMLancs
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15/09/2023 5:28 pm  

How many houses would HAVE to have a 75degC LWT to effectively heat the house though? Also, just because you can run it HT it doesn’t mean it has to- nothing to stop rad upgrades piecemeal down the line if the customer can’t afford the upfront cost. I’m absolutely with you on the efficiency front- I made sure mine was designed for a LWT of 35degC but not all will be able to do that and this at least gives customers the choice (and hopefully some economies of scale).

 

4.4kW PV with 9.5kWh Givenergy battery. 9kW Panasonic Aquarea L ASHP


   
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 Kev M
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16/09/2023 9:46 am  

I think this is a really significant and positive development so well done to Octopus.  It doesn't really matter if 75 deg is never used in practice.  The point is that it can be claimed to be a true retrofit boiler replacement, it looks different (even if it looks like a rubbish bin to me) and it's cheap.  Real installations may end up being somewhere between a drop-in and and rip everything out-and-start-again but that doesn't matter.  With a bit of clever marketing this could be a big step forward if not a game-changer.  And if the Cosy pods/automation means we can all stop obsessing about weather compensation, delta Ts and flow rates, even better 😀 


   
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 Derek M
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16/09/2023 12:17 pm  

@kev-m

What's wrong with you Kev, you can't beat a 'good dose of obsessing' to annoy the Wife. 😜 

I am looking forward to seeing the full details concerning Cosy 6.


   
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Mars
 Mars
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16/09/2023 8:38 pm  

It’ll be a RED designed heat pump, so the tech will be solid… not sure about the “room sensors that help to ensure that every room in the home is heated to the desired temperature” but it’ll be interesting to see what the final proposition is from a tech/tariff perspective.

Buy Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU

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 Wobby1
(@wobby1)
Active Member Member
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09/11/2023 2:39 pm  

Posted by: @chickenbig
↑

Octopus Energy unveils new smart heat system ‘Cosy Octopus’ at Energy Tech Summit

Sounds interesting, even if specs are TBD.

“The combination of a high-temperature heat pump (as hot as a gas boiler), Octopus smart tariffs and room sensors across your home doesn’t just open up cheaper clean heating - but more comfort too.”

Interesting to see this going against the slow-and-steady running philosophy.

 


   
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 Wobby1
(@wobby1)
Active Member Member
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Posts: 6
09/11/2023 2:48 pm  

Gas boilers can be run at up to 80°c but that doesn’t mean one has to run the heating at that temperature. The Cosy 6 may well reduce the COP when run at a high temperature but it also doesn’t have to be run that way. When the weather is really cold outside one might as I do, run the boiler at near 80° however normally I’d run it at 50° and boost the water temp one a week. I feel it’s better to have the ability to run the system at 80° even if it’s rarely used. Then as someone else said gradually as one can afford it upgrade the radiators to T50 or even T30. 


   
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