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 6, 2026
@chansug 50C is probably the top end of what you would want to live with. Its not standard, all houses are different but for efficiency you want to ge...
@chansug Sorry I misread and mistyped! 10mm copper pipe can transmit about 1.15 kW of heat with a delta T of 5C so that would place a limit on each ra...
@chansug which room has the 15mm pipework, what size is it?
@chansug Good advice above. 300mm is considered acceptable loft insulation these days 🙂 The fact that some of the quotes havent specified the flow...
@chansug Welcome to the forum. Could you specify what flow temperature and design OAT the three quotations are given for? 🙂 Also a description o...
@johnnyb Well that all sounds like progress. I’m guessing that the COP figures are calculated from the internal sensors on the unit so should be vie...
“Think of it as a short section of single carriageway road on what is otherwise a dual carriageway. It's an impediment but much better than a lot of s...
@rhh2348 I just mean that from the 22mm copper or plastic pipe spine, each radiator have 15mm plastic down to it. I use John Guest plastic pipe but...
@rhh2348 I find this an interesting question as I did a similar thing after reading John Cantors site. I have 28mm to my 5kW heat pump which then r...
@alfapat the flow temperatures in and out of the buffer tank aren’t really something you can do anything about. They just indicate how much efficiency...
@alfapat There is no such thing as a dumb question, just a dumb answer 🙂
@alfapat I think modern TRVs can be fitted on either side. The lock shield will restrict flow whichever side it is sited
SPONSORS
Degrees of Separation
Latest Posts
-
RE: Heat pump installation quotations
That will be absolutely murdering your energy efficienc...
By EtchedPixels , 4 hours ago
-
RE: Harvest Thermal - ASHP with a smart thermal battery
The cooling side works much better if you can figure ou...
By EtchedPixels , 4 hours ago
-
Floor standing brackets for K3 rads
My neighbour is a plumber and said I would need to fit ...
By Singlespeed , 5 hours ago
-
After an intense recode, I’m pleased to announce that w...
By Mars , 5 hours ago
-
Why do you want to maintain a specific deltaT? The out...
By JamesPa , 6 hours ago
-
Hopefully this will answer your question. To...
By ASHP-BOBBA , 7 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 , 7 hours ago
-
Don't you dare. You just carry on as you are; as @batpr...
By Majordennisbloodnok , 9 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 , 9 hours ago
-
RE: Several AC coupled batteries
That is a good point, a manufacturers can stop trading,...
By Batpred , 13 hours ago
-
RE: Indevolt Batteries UK Support & Info Thread
Hi @hanno - good question. The range of hybrid invert...
By Transparent , 13 hours ago
-
RE: GivEnergy inverter tripping due to over-voltage?
@transparent the inverter was installed in 2021 and afa...
By Tim441 , 14 hours ago
-
RE: Say hello and introduce yourself
I hope so, @toodles. It's not often that we see a situa...
By Majordennisbloodnok , 17 hours ago
-
RE: Electricity price predictions
Good point, I do expect the bonus of putting my energy ...
By Batpred , 2 days ago
SPONSORS
