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
Very curious, this Rod Ive always understood from heat geek video that the poorest efficiency stage is at the beginning of a HP Operation cycle and ...
James, can you remind me what is your definition of setback, in terms of temperature? What are you defining as target daytime room temperature and wha...
a second look for derek
@cathoderay thanks for that update youre right imo, and that’s why I started with the extreme example ... 20% is significant although JPA might still ...
. @derek-m very funny realizing that’s you just being your humourous self I won’t bother reminding you and James that I did say it was an extreme e...
I think @jamespa quoted you are thinking there is only a 5% saving when operating a setback. This obviously seems a small saving for the effort of doi...
I’m a bit lost on this thread can someone enlighten me if the topic has changed? It was : “Do setbacks save energy without compromising comfort?” ...
Of course... I’m sure it will be enlightening.... btw ive attached the following hourly chart showing the modulated operation for 56 minutes (not 30...
@rod and Derek.... fascinating graph esp to see the kw used to restart heating after defrost. I can’t get that overlay on my graphs. However there i...
That’s ok… if you’re getting the room temperature you want at all outside temperatures then you may as you say, be lucky and have got the right WCcurv...
This is exactly the same issue we had with our installation a year ago. We had the missing energy data. We also had a 3rd party thermostat which meant...
30th November was a bit cold we operated a setback to 16C and still got a TOPUP in the middle of the night Room temp is black line. Green is Outsi...
- 27 Forums
- 2,756 Topics
- 64.8 K Posts
- 1,077 Online
- 7,160 Members
Join Us!
Installer Finder
Degrees of Separation
Latest Posts
-
RE: 7kW EV Charger Options Advice
I was hoping that the electrician would route the under...
By Rusty , 7 hours ago
-
RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
@jamespa @transparent Sorry about that. Here are the ch...
By jon , 7 hours 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 , 9 hours 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 , 11 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 , 17 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 , 6 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 , 7 days ago
Members Online
No online members at the moment



