Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!
Last seen: Jun 13, 2026
@jamespa thanks James. That’s an interesting figure: just before Christmas, Octopus visited to do another heat loss survey and determined the origina...
My Cosy 9 is managing to keep pace with the cold weather with downstairs rooms at around 22.0 - 22.3c. Downstairs hall, which is mostly an internal r...
I haven't made any changes over the christmas period and waiting on Octopus to get back to work. I do want to try the decorators' cap approach though...
The FT levels off at either the set point OR the minimum flow temp it can reach, so once the FT is 35c for the Cosy 9, it levels off irrespective of t...
@kevh It's something I'm trialling at the moment - I've set the Cold Weather Max Flow temp to 50c at -10c and left the Warm Weather Flow Temp at 36c. ...
@harrisonc wow. That’s going to get the rumour mill grinding!
@harrisonc I guess lots of possibilities. The Cosy tariff has fixed slots but Octopus Agile is highly variable; it could also be to allow Octopus to...
@harrisonc The comment related to not being able to control the thermostat but can change the WC values is interesting. Does that point to a new feat...
@harrisonc I've not seen that, it's not coming up on my feed. I definitely think you want to be careful playing around with the interface areas th...
I can't figure that one out either. The person I spoke to today had me log on and slipped in the password "octopusenergy" all lowercase but obviously...
I had a re-survey completed this morning and the heat loss came down by 1000W. I'm not totally convinced it shouldn't be more, but notwithstanding, i...
To get onto the web page the first time, the passcode is on a sticker on the Hub. It ought to be remembered after that.
- 26 Forums
- 2,677 Topics
- 62.6 K Posts
- 214 Online
- 7,090 Members
Join Us!
Installer Finder
Degrees of Separation
Latest Posts
-
RE: Heat pump installation quotations
That will be absolutely murdering your energy efficienc...
By EtchedPixels , 20 minutes ago
-
RE: Harvest Thermal - ASHP with a smart thermal battery
The cooling side works much better if you can figure ou...
By EtchedPixels , 34 minutes ago
-
Floor standing brackets for K3 rads
My neighbour is a plumber and said I would need to fit ...
By Singlespeed , 1 hour ago
-
After an intense recode, I’m pleased to announce that w...
By Mars , 1 hour ago
-
Why do you want to maintain a specific deltaT? The out...
By JamesPa , 3 hours ago
-
Hopefully this will answer your question. To...
By ASHP-BOBBA , 3 hours ago
-
RE: Help me keep the faith with my air source heat pump installation
I would be interested to find out if others do this and...
By ASHP-BOBBA , 4 hours ago
-
Don't you dare. You just carry on as you are; as @batpr...
By Majordennisbloodnok , 5 hours ago
-
RE: Heat pump design review please: 5 kW Vaillant aroTHERM Plus heat pump
@ragtime27 some rooms in our house only have one place ...
By Judith , 5 hours ago
-
RE: Several AC coupled batteries
That is a good point, a manufacturers can stop trading,...
By Batpred , 9 hours ago
-
RE: Indevolt Batteries UK Support & Info Thread
Hi @hanno - good question. The range of hybrid invert...
By Transparent , 10 hours ago
-
RE: GivEnergy inverter tripping due to over-voltage?
@transparent the inverter was installed in 2021 and afa...
By Tim441 , 10 hours ago
-
RE: Say hello and introduce yourself
I hope so, @toodles. It's not often that we see a situa...
By Majordennisbloodnok , 14 hours ago
-
RE: Electricity price predictions
Good point, I do expect the bonus of putting my energy ...
By Batpred , 1 day ago



