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: May 17, 2026
@editor i have detailed my experience with Octopus on your forum, if you need further discussion on them id be happy to spend a few hours detailing ho...
@papahuhu thanks for the info, not sure Id want a sauna, Im aiming for a nice background heat from UFH and no draughts. I’m walling in the stairs and ...
@andrewj your right, the loft insulation will keep more heat in the bedrooms, its one of the areas Octopus and me disagreed on. I have kingspan in the...
@andrewj The heat pump survey should identify the heat loss of the building. As your house is overheating, this points to the survey being wrong and...
@jamespa maybe we can suggest this to Mars to discuss with heat pump manufacturers
@jamespa The flow temp of my system is set at 36C on the Cosy Hub, the temp gauges on my UFH manifold show a flow of 37C and return of 27C, effective ...
@andrewj have you tried setting it at 2 and 1 and recording what temperature the room gets to. I did that in all my upstairs rooms with radiators an...
@andrewj why is the TRV not working? With it set at 1 the room temp wont get above 18C, setting 3 is 21C i have my spare rooms set at 2 to focus the...
@toodles if @andrewj needs to turn the lock valve to almost shut, doesn’t that point to the radiator being way over sized? The diameter of the flow ...
@ecoste i was reading the installation manual for my Cosy6 stored in manuals.lib last night. It warns not to set flow temp below 36C as it affects per...
@swwils OTA can only occur if the code is held in electrically alterable rear only memory, EAROM. Often a processor has code baked into it, which is w...
@kevh the engineer told me he had a box full of old pcbs that get sent back to NI for processing; likely he means new firmware coded onto the pcb
Latest Posts
-
RE: Heat Pump Overpromising – What Were You Actually Told Before You Bought?
@jamespa, really thoughtful as always... for me the pro...
By Mars , 4 minutes ago
-
RE: Heat Pump Manufacturers Recommending Buffer Tanks
@tony-stolz, I think @jamespa has already covered the h...
By Mars , 12 hours ago
-
RE: How many people are happy with their ASHP and do you believe them?
Good luck, I spent a couple of hours and, whilst I foun...
By JamesPa , 13 hours ago
-
RE: Heat Pump Operation in Summer - Valliant 7kW
I do the same: cool my large buffer (3000L) to 10C, pum...
By upnorthandpersonal , 21 hours ago
-
@editor "The interesting bit is that many modern invert...
By Singlespeed , 22 hours ago
-
RE: Ecodan & MelCloud scheduling
With the prospect of warmer weather this week, I brough...
By downfield , 23 hours ago
-
RE: A2A vs A2W: Which Heat Pump Would You Pick?
I reached out to MCS directly last week on this and her...
By Mars , 23 hours ago
-
Mentally you have to separate the ac side and the DC si...
By JamesPa , 2 days ago
-
RE: Help me keep the faith with my air source heat pump installation
My heating developed a really severe case of noise and ...
By JamesPa , 2 days ago
-
RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!
@l2jad I was just thinking all things being equal. Our ...
By AndrewJ , 2 days ago
-
Hi, Does anybody have experience with Heat Geek insta...
By sttpd1917 , 3 days ago
-
I will soon be struggling. Admittedly it is the summer,...
By Batpred , 3 days ago
-
RE: Indevolt Batteries UK Support & Info Thread
Not known yet. I've asked a local Councillor to follo...
By Transparent , 4 days ago
-
Hard to tell but I think I have placed the arrow on wha...
By ASHP-BOBBA , 4 days ago
