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 3, 2026
Some things worth mentioning: (1) the Headroom Heat Pump Heat Loss calculation is still just a calculation based on whatiffery. In the case of Midea...
The cylinder is there because heat pumps are 'low and slow' - they can't do bursts of high heat output, so you have to heat the water over a period of...
Which tells us something (including possibly everything) is not right. can you describe exactly how the data gets from wherever it originates to this ...
The thing is most people aren't physicists. If they buy an 100mph car, they expect it to go 100mph. I've suggested many times that the standard condit...
I agree, the badge rating is about output, and I think @drei's recent posts showed inputs, which is why I asked about outputs, and thereby COPs. Recal...
This is all part of the smoke and mirrors around heat pump marketing. My unit is badged as a 14kW unit, but the maximum it has ever put out is 11.52kW...
In effect you are relying on the manufacturer marking their own homework. Is there any way you can validate these readings? For example, I have an ind...
@wh0am3ye - OK, starting to make sense, but it does mean you have a buffer which as you will know from this forum is usually, though not always, not i...
- 27 Forums
- 2,756 Topics
- 64.8 K Posts
- 1,360 Online
- 7,161 Members
Join Us!
Installer Finder
Degrees of Separation
Latest Posts
-
RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
@cathoderay I've deblobbed the chart and extrapolated...
By jon , 14 minutes ago
-
RE: Being screwed over by Volkswagen Audi Group
No worries, I can't really argue with your logic and I ...
By Old_Scientist , 2 hours ago
-
RE: 7kW EV Charger Options Advice
Thank you Rusty, all of those subtleties were lost on m...
By Judith , 6 hours ago
-
RE: Next steps on my ASHP journey: Radiators and Pipework
Flow rate is set by pressure created by the circulator ...
By bobflux , 24 hours ago
-
RE: Glass lined Cylinder for private water supply
I have one of those... a Thermal Store. In my case th...
By Transparent , 1 day ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
@tim441 Here are those same three month periods for 202...
By Toodles , 1 day ago
-
RE: Adding additional Solar Panels to a DC coupled battery system
@transparent thank you for your reply above. As alway...
By Old_Scientist , 2 days ago
-
RE: How Accurate Is My DIY Heat Loss Calculation?
@kilgorexv definitely a larger inverter will help and m...
By AndrewJ , 4 days ago
-
RE: Adventures in heat loss calculations
@rob-of-york — thanks for posting this, all very useful...
By cathodeRay , 4 days ago
-
RE: Surface mount or bury primaries for heat pump installation?
The installation is almost done! I've written up two ...
By tomasmcguinness , 4 days ago
-
RE: Switch suitable to change between two inverter CT's
Last winter my battery ,32KWh, could run the house com...
By Jancold , 5 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 , 5 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 , 5 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 , 1 week ago


