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: Aug 16, 2026
@cbrenewable Hopefully the diagram shows one of the valves in the wrong place, otherwise there is a valve in the wrong place. Any idea why two pumps...
@trebor12345 Hi. What is it you are still trying to solve/understand. I will see if I can help. Definitely that is a 4 port buffer.
@CBrenewable A COP of 2.4 is definitely low and you are right to be concerned. You should be seeing 4 or better at present. Can you tell us s...
Have you got the loss calculations, if so perhaps you could post?
The output of a rad is proportional to DT to the power 1.3, where DT is the average temperature difference between rad and room. At a flow temperatu...
Just to clarify this was a serious question, its going to be easier to explain your observations above if you have plots. If you dont then just say a...
Ok on second thoughts scrub the questions. Id be tempted to optimise the rads as previously described. If you find that this results in a rad curve ...
Ok. When you say max 50 what changes it? Does it in practice run at 50 and if so does the zone valve switch it on and off? Basically I'm trying to...
@rhh2348 have you got graphs to illustrate this, if so can you post them please (or were you sitting and watching?)
@tomdad How is it all connected/controlled. The heat pump can only produce water at one temperature at any one time, so either it's all running at...
Yes. Just find any radiator catalogue eg myson or stelrad and look it up. This will give you W at a DT of 50C between flow temp and room. To conver...
SPONSORS
Degrees of Separation
Latest Posts
-
@editor Thanks for your response and recommendations. ...
By DavidB , 4 hours ago
-
RE: Do I add Air Con or MVHR to existing A2W ASHP?
I think I saw a diagram for an exhaust air dhw tank wit...
By JamesPa , 17 hours ago
-
RE: Who's your electricity provider and what's your tariff?
@papahuhu Of course, in the way of such things, there a...
By Toodles , 1 day ago
-
RE: Indevolt Batteries UK Support & Info Thread
Thanks, however that's an answer to a subtly different ...
By JamesPa , 3 days ago
-
RE: Flushing system, cleaning and inhibitor
Yes, my 50L volumiser uses the two lower ports, so ther...
By Old_Scientist , 3 days ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
@toodles Such elegant symmetry. look at my lumpy bag of...
By Papahuhu , 4 days ago
-
RE: PV and battery long payback - sense check query
Quite probably not, but you can get a 32A relay and a S...
By JamesPa , 4 days ago
-
RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
@ian-s Look forward to making contact soon! Regards, To...
By Toodles , 4 days ago
-
I don't notice mine defrosting, and most of the time Im...
By JamesPa , 5 days ago
-
RE: Do I need to change the control unit when replacing my Ecodan Air Source Heat Pump
Kind of you, @calumm, but it was @f1p who did the heavy...
By Majordennisbloodnok , 5 days ago
-
RE: Electricity price predictions
2. As EV ownershp increases it'll certainly increase de...
By EtchedPixels , 6 days ago
-
I meant to say I cannot register my kit at Energyplus… ...
By Batpred , 6 days ago
SPONSORS
