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: Oct 11, 2025
Spoke to a representative of Joule today. He confirmed the volumiser was designed in to allow more volume for the defrost cycle. He said that the co...
sure, he's currently on holiday...
@old_scientist Thanks. We came to this conclusion earlier, but good to see it confirms our thoughts.Note, placing the tank as suggested in the article...
@derek-m Sounds like a good approach. Would you still suggest changing the volumiser into a buffer tank to assure a defrost cycle? At one occasion...
Many thanks @johnmo for the clarification. This makes it all a bit more clear to me. We seem to have a volumiser on the combined flow from the AS...
Below some photographs of my system. Had a chat this morning with the plumber and he seems open for suggestions. He claimed the volumiser is the...
@johnmo Ah, didn't know it's called a volumiser when placed upstream of the diverter, anyway extacly my point heating 50L for no reason. I ...
I agree we need the buffer tank when using thermostats (not ideal), but my main question is, should it be placed in the primary circuit i.e. in series...
@johnmo Agree. It's a 180m2 bungalow with modern 150mm cavity insulation.When questioned the developer, he said 'well, just to be sure it will handle...
SPONSORS
Degrees of Separation
Latest Posts
-
RE: The Changing Jet Stream Could Challenge UK Air Source Heat Pumps
@rob-of-york Thanks Rob! A LOT to digest here! Plea...
By SusannaSaunders , 21 minutes ago
-
RE: Electrical works for air to air heat pump
An electrician who signs off work is responsible for it...
By EtchedPixels , 2 hours ago
-
RE: Are there any comparisons of DHW heat stores around?
@sarahemmm I have done things the opposite way round I ...
By Toodles , 3 hours ago
-
RE: 15kw pump for 225m2 1990's house - over kill?
@seaviews I have read you latest response re buffer ...
By JamesPa , 22 hours ago
-
RE: How will removing the standing charge on gas bills benefit heat pumps?
The BUS grant funding for 2026/27 will run out at the c...
By Rob of York , 1 day ago
-
-
@editor Ouch, sorry to re start the tick. I had assume...
By DavidB , 3 days ago
-
RE: Say hello and introduce yourself
@e-a-west as the good Major said, welcome to the forums...
By Mars , 3 days ago
-
RE: How much of your renewable and home setup would still work if the internet went down?
Yes I actually have a copy of a tool that whenever a ce...
By EtchedPixels , 3 days ago
-
RE: Indevolt Batteries UK Support & Info Thread
@editor Hi, To resolve this, please tap on the A...
By Indevolt Tech , 4 days ago
-
RE: Double or Triple Glazed Windows?
Posted by: @singlespeed With 9 years repairing windo...
By Rob of York , 4 days ago
-
@transparent we’re still running a secure version of PH...
By Mars , 4 days ago
-
RE: How quickly would you want/expect heat recovery to take from setback?
Much longer than that here. The heating isn't even on. ...
By bobflux , 5 days ago
-
RE: Passiv Smart Thermostat - Help & Forum Support
Obviously the weather is changeable but there's a defin...
By Singlespeed , 5 days ago
SPONSORS
