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 26, 2026
Your DT is to low, you do not have enough heat exchange would be my 1st thought, it might explain the short cycling. How old is your home as the app...
I don't know Grant system but most ASHP are very similar. The grant controller should act as the only stat on an open loop for best performance and yo...
@2019ashp can you post a pic?
Yes, I have seen "many times" where the indirect coil connections raise up but no air bleed, it only takes a small amount of air in the line to effect...
@maximumdo Great, good luck with the quotations and getting the works done.
Just one more thing to add, the best UFH is thick screed, next is overlay and next is deflector plates, my advice is if they are looking to give you 5...
These deflector plates are very soft, you can cut them with sharp taylor scissors, sheers or cheep drill nibler. I even found that for you 🙂 as y...
@maximumdo this one has 200mm centres so you could trim the plate to 70mm each side (70+200+70= 340mm) of the pipe so they overlap by 20mm to...
I don't know the Grant system but this is common when there is air trapped in the tank circuit which causes the water to have reduced flow and reduced...
To add, you will probably find the UFH brand they used sells a spreader plate application to suit the pipe, if not I think as standard they take a 16m...
You must heat a mass when using UFH, the only alternative I can think of if you do not use a mass like screed is to use deflector plates that clip the...
@darlomrh, not quite, it is normal to set the unit up so that each wireless stat can energise the Ecodan and run any single zone, usually there would ...
SPONSORS
Degrees of Separation
Latest Posts
-
RE: Siting of the external sensor on a heatpump
My heat pump receives sunlight, so when the fan is not ...
By bobflux , 6 minutes ago
-
RE: Next steps on my ASHP journey: Radiators and Pipework
You should (almost) always reject having a buffer, by w...
By JamesPa , 16 hours ago
-
RE: Navigating the World of Refrigerants In Heat Pumps: A Guide for Homeowners
Indeed we are invvestigating AC at present and are havi...
By Toodles , 19 hours ago
-
RE: Is it the house or the equipment?
@majordennisbloodnok I do sympathise. On the original...
By springswood , 21 hours ago
-
No, but the heat pump must be capable of delivering a S...
By JamesPa , 1 day ago
-
Sorry to hear about the problems, its going to be somet...
By JamesPa , 1 day ago
-
RE: Daikin ESPAltherma and Home Assistant installation
It's laziness lol The PV system is very chatty, meter...
By bobflux , 2 days ago
-
RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
R (The R Project for Statistical Computing, I use it wi...
By cathodeRay , 2 days ago
-
RE: Vaillant Arotherm Plus 7KW need a service on it
booked it with Vaillant. will use them until i can find...
By AdamK , 2 days ago
-
RE: Adventures in heat loss calculations
I have seen it stated that the declared calorific value...
By JamesPa , 2 days ago
-
RE: Two heating zones to one zone
@transparent Many thanks. The garage is fairly well ...
By Profzarkov , 3 days ago
-
RE: Vaillant Aurotherm - Heater Wire Position
Ah, good point. I need to check if this was installed i...
By Batpred , 3 days ago
-
@batpred thanks for getting a copy. Appreciate the supp...
By Mars , 4 days ago
-
RE: Tell us about your Solar (PV) setup
We have a 6.56kW solar PV system (16x 410W panels) inst...
By Rob of York , 4 days ago
SPONSORS
