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: Sep 10, 2026
You're more likely to die from DC because the human nervous system doesn't automatically cause the muscles to pull your body away.... just a thought !...
Solar thermal panels are at least 80% efficient,whereas the max. possible efficiency from a (single sided) silicon PV panel is 23%. I have 30 vacuum...
I've just addressed this issue here in the topic DIY solar upgrade. I've spoken with the senior NGED engineer who issues their operational specifica...
Yes, the meter is installed by your Energy Supplier, for which they have to meet Ofgem targets, but also benefit from a subsidy. Here's a diagram sh...
I have attempted to address the subject of phase-imbalance by using analogies rather than referencing some of the excellent academic papers on the sub...
I wonder if this diagram provides an idea of what happens when the demands on a substation are unbalanced across the 3 phases: I'm starting with the...
Here's the classic 3-phase diagram of voltage against time, which will make better sense of Derek's explanations. I've just drawn this from scra...
... which it doesn't, because the Neutral is rarely fused. Instead, the Neutral wire gets hot, which eventually creates thermal breakdown of the ins...
Yes... and most of that will be down to ignorance. When I see an outage pop up on the NGED Regional alert page, I tend to check where it actually is...
And you're very unlikely to! There are 230,000 ground-mounted local substation transformers and a further 320,000 pole-mounted. Only a few hundred...
To underline those comments from @derek-m 19kW equates to 80A, which is the size of Service Fuse being deployed by DNOs when they get called to site f...
I think both @david999 and @bretix are missing something which I've found an essential part of my route to understanding how this green technology pro...
SPONSORS
Degrees of Separation
Latest Posts
-
RE: Siting of the external sensor on a heatpump
I think not but have now added the cloud coverage weath...
By Batpred , 4 hours ago
-
RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
@judith Thanks very much for this! My room by room calc...
By jon , 8 hours ago
-
RE: Vaillant Arotherm Plus 7KW need a service on it
I think that is outrageous even if I suspect not unique...
By Batpred , 9 hours ago
-
RE: Two heating zones to one zone
@transparent Many thanks. The garage is fairly well ...
By Profzarkov , 12 hours ago
-
RE: Vaillant Aurotherm - Heater Wire Position
Ah, good point. I need to check if this was installed i...
By Batpred , 18 hours ago
-
RE: Adventures in heat loss calculations
Posted by: @jamespa At this point its probably worth...
By Rob of York , 20 hours ago
-
@batpred thanks for getting a copy. Appreciate the supp...
By Mars , 1 day 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 , 1 day ago
-
RE: Where heat loss surveys seem to go against practical reality
@cathoderay @jamespa I've managed to get some nice re...
By Rob of York , 3 days ago
-
RE: 7kW EV Charger Options Advice
Doh, not sure that I was thinking straight there, less ...
By Rusty , 3 days ago
-
Thank you @trebor12345
By rgabor , 3 days ago
-
Panasonic Free Multi Z and Etherea Internal units.
My prospective installers have suggested the Panasonic ...
By Toodles , 3 days ago
-
RE: Next steps on my ASHP journey: Radiators and Pipework
Great. You just need to find a way of cranking up your...
By JamesPa , 3 days ago
-
RE: Heat Pumps Without Grants: Would You Have Installed One & Will You Now?
We had two heat pumps installed without Govt funding. H...
By Rob of York , 3 days ago
SPONSORS
