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: Jan 10, 2026
es, the house is a lot warmer and consistant ,with changing to balancing with lockshields, but using up a lot mor kw I fear . Over the last 7 days wi...
@heacol and thanks James, I will look at all the labelling to see if any of the pumps differ in Spec. I already have two spare ones chucked aside in t...
Yes all the same model , with a selectable speed as mentioned before , selectable manually by a button , but not sure if controlled otherwise. I will ...
Yes , I have three circulating pumps , one from HP and one circulating and one return, They do go on and off but I cant tell in what sequence , At the...
@jamespa Hi James , I thought I would draw out what is the best I can do , my system arrangement to help understand what I have in place , if you want...
@jamespa Thanks , once again! Is that not the flow rate shown on that page I posted, 16L/pm or is that a completely different thing you’re talking abo...
Ok James , thank you for your thoughts there . The option to bypass being the the drawing that you sketched ? perfectly willing to change 22 to 28 mm ...
Been 2hrs since DHW has been used , only a small amount used and sitting at 47.06 c , should be 50c set for programme , I have been in 20mns and DHW ...
Ill check all again, definetely LSV's open and balanced TRV.s fully open and one LSV fully open, 22mm does become 28mm. I will check return flow t...
OAT -2C Output to RADS 37.9C Return 24.4c Flow from HP 42.8Cc Return to HP 34.9c
@jamespa I have been up to change the CH pump and return pump back to No.3 and taken a note of flow temps circulating the CH . I will take another rea...
Perhaps the information is on here, it mentions on the comissioning sheet the circ speed should be three on the pumps , it has been on that upto a wee...
SPONSORS
Degrees of Separation
Latest Posts
-
RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
@jon - I'm finding this particularly difficult to follo...
By Transparent , 15 seconds ago
-
RE: 7kW EV Charger Options Advice
I had only a granny charger for the first two years of ...
By JamesPa , 8 minutes ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
@tim441 Yes, I too am waiting for V2H before I get an E...
By Papahuhu , 19 minutes ago
-
RE: Next steps on my ASHP journey: Radiators and Pipework
Post by: @old_scientist The first thing I would say ...
By Rob of York , 3 hours ago
-
RE: Adding additional Solar Panels to a DC coupled battery system
@transparent thank you for your reply above. As alway...
By Old_Scientist , 9 hours ago
-
RE: How Accurate Is My DIY Heat Loss Calculation?
@kilgorexv definitely a larger inverter will help and m...
By AndrewJ , 2 days ago
-
RE: Adventures in heat loss calculations
@rob-of-york — thanks for posting this, all very useful...
By cathodeRay , 2 days ago
-
RE: Surface mount or bury primaries for heat pump installation?
The installation is almost done! I've written up two ...
By tomasmcguinness , 3 days ago
-
RE: Glass lined Cylinder for private water supply
This has turned into a fascinating little rabbit hole. ...
By Mars , 3 days ago
-
RE: Switch suitable to change between two inverter CT's
Last winter my battery ,32KWh, could run the house com...
By Jancold , 3 days ago
-
RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
Agree with Major. And even if I was very happy with ...
By Batpred , 3 days ago
-
RE: Is the "divide by 2900" rule still valid?
There is another estimator that you could use, a formul...
By Rob of York , 3 days ago
-
RE: To re-pipe or not to re-pipe? Moving from oil boiler to air source heat pump.
@penval, really useful update. After all the discussion...
By Mars , 5 days ago
-
RE: Who's your electricity provider and what's your tariff?
@papahuhu I prefer to look at it simplistically. We d...
By Old_Scientist , 6 days ago
SPONSORS
