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 13, 2026
You might not be able to, but your installer definitely could. If you swap flow and return either on the primary side or the secondary side then basi...
With that drop its clear that very little hot water is getting from the primary into the secondary so either pump problem or piping problem. Has he p...
Really sorry to hear this, I was expecting no change not a deterioration and I must therefore eat humble pie following my comment that swapping a smal...
made of brass not plastic, proper square hole same shape as bleed screw. I did a quick search and they seem relatively rare, most seem to be a (pres...
Definitely. 8C DT is higher than the default design DT for most heat pump systems which is 5 This has the effect of reducing the average flow temp b...
Thats a great analysis and |I doubt any heat loss calculations adequately deal with this. Put another way there is an (probably) unaccounted for loss...
Thanks. I had forgotton that particular feature. I presume the call for heat switches secondary pumps on/off not the heat pump. All of this is goi...
Its the heat pump, more specifically the compressor, cycling on/off quickly. The most important parameter is the on time, anything less than about 1...
It will inevitably. If your heat pump capacity is perfectly matched to your house loss you can expect the heat pump to cycle from an OAT of roughly 1...
re 'enforced night mode running constant at 60%' are you saying that the heat pump was previously forced on (at 60% modulation) at night. If so thats...
With the expanded view you can see it ticking along at about 300W other than during the DHW reheat and between 4.30 and 5am. The spikes are very narr...
OK, couple more questions At these relatively mild temps, how certain can you be that its not just a WC setting problem that would be resolved by le...
SPONSORS
Degrees of Separation
Latest Posts
-
RE: Flushing system, cleaning and inhibitor
If an old radiator was reused, perhaps it was full of s...
By bobflux , 6 hours ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
@toodles Such elegant symmetry. look at my lumpy bag of...
By Papahuhu , 7 hours ago
-
RE: Indevolt Batteries UK Support & Info Thread
This is very helpful, thank you.
By dansus , 14 hours 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 , 15 hours ago
-
I am surprised by Vaillant and I would press them on th...
By JamesPa , 15 hours 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 , 15 hours ago
-
I don't notice mine defrosting, and most of the time Im...
By JamesPa , 1 day 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 , 2 days ago
-
RE: Electricity price predictions
2. As EV ownershp increases it'll certainly increase de...
By EtchedPixels , 2 days ago
-
I meant to say I cannot register my kit at Energyplus… ...
By Batpred , 2 days ago
-
RE: HomeTherma Is Live: A New Home-Energy Platform Built Around the Homeowner
Signed up!
By bobflux , 4 days ago
-
RE: Has anyone seen this problem before? Huge anticycling times
Oh dear. Glad it was replaced. I have been mighty imp...
By JamesPa , 5 days ago
SPONSORS
