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...
- 26 Forums
- 2,675 Topics
- 62.6 K Posts
- 246 Online
- 7,090 Members
Join Us!
Installer Finder
Degrees of Separation
Latest Posts
-
Whats more relevant is that a badly installed air/air s...
By EtchedPixels , 27 minutes ago
-
RE: Help me keep the faith with my air source heat pump installation
I didn't know about those, they look like good pieces o...
By JamesPa , 2 hours ago
-
@mkz, that's very helpful. Even if Urban Plumber are no...
By Majordennisbloodnok , 2 hours ago
-
RE: Several AC coupled batteries
That is a good point, a manufacturers can stop trading,...
By Batpred , 3 hours ago
-
My first question is why bother with the auto balancin...
By JamesPa , 3 hours ago
-
RE: Indevolt Batteries UK Support & Info Thread
Hi @hanno - good question. The range of hybrid invert...
By Transparent , 3 hours ago
-
RE: GivEnergy inverter tripping due to over-voltage?
@transparent the inverter was installed in 2021 and afa...
By Tim441 , 4 hours ago
-
I share the same experience as @majordennisbloodnok hav...
By Old_Scientist , 5 hours ago
-
RE: Say hello and introduce yourself
I hope so, @toodles. It's not often that we see a situa...
By Majordennisbloodnok , 7 hours ago
-
RE: Heat pump design review please: 5 kW Vaillant aroTHERM Plus heat pump
@jamespa many thanks, definitely i will give the pre...
By ragtime27 , 19 hours ago
-
RE: Heat pump installation quotations
@jamespa I noticed that in the Heat Geek design consult...
By Batpred , 20 hours ago
-
RE: Electricity price predictions
Good point, I do expect the bonus of putting my energy ...
By Batpred , 1 day ago
-
RE: Daikin ESPAltherma and Home Assistant installation
@bash, something we haven't touched on already relates ...
By Majordennisbloodnok , 1 day ago
-
RE: Air source heat pump roll call – what heat pump brand and model do you have?
Vaillant arotherm plus 12kW. Installed March 2025. Ex...
By Harebell , 2 days ago


