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 23, 2026
Thanks. Nothing is simple about heating! My observation about the discrepancy of the onset of cycling between the model and the measurements was ac...
Thanks for the update but I confess Im now a bit lost. 'The raw data' is presumably actual data from a real heat pump, was it @cathoderay 's or someo...
The wc is a curve because of the emitter power vs ft curve, (which I have been told is linear for ufh, but have not verified). So far as I can tell ...
@derek-m I'm not certain what these are telling us. Am I comparing calculated vs actual iat, in which case there seems to be a small divergence which...
Agreed Agreed (sadly but inevitably) Just bear in mind that we need as much data for the 'control' (ie without setback) as we do for the se...
Thanks for the extra data. 1C reduction in IAT should in theory reduce energy consumption by 1/(IAT-OAT). If IAT is 20 and OAT is 10 that's 10%. A...
For what it is worth I'm fairly comfortable that modelling results predict modest savings (3-5%) for mild OATs with a setback regime that for many wil...
@derek-m may correct me but I don't believe the model does cycling as such. My understanding is that it recognises the occurrence in the 'duty cycle'...
Im not sure why this was directed at me especially, but since you ask here are my thoughts: For the purpose of the second half of the question I thi...
@cathoderay Yes understood, in general terms. But given that you cant measure the 'actual observed energy in value for the hour' multiple times in t...
As you say much tighter. This allows you, as you say, to get an average expected value. Your actuals will have the same scatter so you will need to...
SPONSORS
Degrees of Separation
Latest Posts
-
RE: Solar Power Output – Let’s Compare Generation Figures
@downfield I was seriously considering Tide Lifestyl...
By Papahuhu , 3 hours ago
-
RE: Passiv Smart Thermostat - Help & Forum Support
Thanks Will. I'll probably be a week or so before get...
By Singlespeed , 4 hours ago
-
RE: Cooling using an air to water heat pump
From experience this summer, a single-split A2A unit on...
By Rob of York , 11 hours ago
-
@mrkfm, I’m definitely not trying to put anyone off get...
By Mars , 1 day ago
-
RE: Why are ASHP installs so expensive?
Posted by: @springswood I confess to becoming a litt...
By Rob of York , 1 day ago
-
Analysis of the economics of switching to an A2W ASHP compared to other heat sources
This post aims to analyse the economics of installing, ...
By Rob of York , 1 day ago
-
RE: Cooling with air to water heat pumps
@editor does that mean you have to have two separate ex...
By mrkfm , 2 days ago
-
RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
Posted by: @ian-s Could always use the money saved o...
By Rob of York , 2 days ago
-
Depends on what controls the pump! Thats the whole poi...
By JamesPa , 3 days ago
-
The positive reviews keep coming in for Britain's Heat ...
By Mars , 3 days ago
-
RE: Next steps on my ASHP journey: Radiators and Pipework
I have one of these fitted which also allows you to reg...
By Old_Scientist , 3 days ago
-
RE: Recommendations in Ely (Cambs) area for Full setup checks on Nibe HP setup for House.
If they can't don't give up. Heat pumps are, in reali...
By JamesPa , 4 days ago
-
RE: Missing flow temperature in Heat Geek proposal
Yes that's what would happen by turning down the lsv to...
By JamesPa , 4 days ago
-
RE: Grant R290 DHW Cycle Interuption
It looks like some sort of short pre-run. The question...
By JamesPa , 4 days ago
SPONSORS
