Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering youāll be able to ask questions, join discussions, follow topics youāre 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: Mar 21, 2026
@jamespa apologies James Iām on a train so dashing between platforms
@heatgeek I wouldn't normally comment on such a varied emitter scheme. I think Iām just trying to establish a few principles of HP operation in a simp...
My first thoughts are that the process is more dynamic than your model suggests. Your idea that demand is determined by the house isnāt quite how I se...
hi @jamespa Thanks for your reply. Thinking I can see a pretty good analogy and I will post it in the morning. 👍
Yes I think Thatās quoted quite a lot if Iām getting your ratio of 3 correctly. The problem is, like all rule of thumb approximations is that that man...
My original post was as followsā¦.
Thanks for the nod James Hopefully my hand drawn āspreadsheetsā are working nowā¦. and the more detailed spreadsheetā¦.. I hope the numbers are ...
Thanks for the official documentation info @transparent . I hadnāt read the most recent offeringā¦. Is it me or does it really avoid tying anything dow...
not sure I agreeā¦ most of the sizing issues can be done at the design stage as a calc exercise. And as you and I have discussed previouslyā¦ the design...
With due regard for the title of this topicā¦ This debate has been brewing for quite a few weeks now. It certainly asks some questions of the standar...
@clockworks while your sorting your wireless controller I have time to write a post on your rad capacity and the correct maths for sizing. So maybe l...
Hi @clockworks Yes I sent you the charts which showed 3kw minimum output. I was very impressed when you managed to create the same hourly chart a...
SPONSORS
Degrees of Separation
Latest Posts
-
Looks like the gas pipe replacement in our road will ta...
By Jeff , 28 minutes ago
-
RE: Home Alone with Home Assistant (previously A Beginner's Guide to ASHP Monitoring)
I know you're still familiarising with HA, so since I d...
By Majordennisbloodnok , 1 hour ago
-
@transparent Thanks for the reply. The main problem I h...
By philmore , 1 hour ago
-
RE: Surface mount or bury primaries for heat pump installation?
Quick update on this - it's been quite a long time as p...
By tomasmcguinness , 2 hours ago
-
RE: Say hello and introduce yourself
@etchedpixels Ours is a little more involved as one roo...
By Toodles , 17 hours ago
-
RE: Design Of Cascade System Replacing Undersized ASHP
@temperature_gradient thanks but my focus is just getti...
By pash44pump , 19 hours ago
-
RE: Home energy storage & battery register
3 x Alpha ess smile5 inverters each with 20kwh 20kw p...
By philmore , 22 hours ago
-
RE: GivEnergy inverter tripping due to over-voltage?
I think I ought to go into greater detail on what is re...
By Transparent , 1 day ago
-
RE: How do I set up Tesla Powerwall export for saving sessions since AI Takeover?
@papahuhu We might well have found that a much smaller ...
By Toodles , 2 days ago
-
RE: Summer heat is becoming the new winter cold in the UK. What are you doing about it?
Some pics of my heat solutionsā¦ Bought the shut...
By Watcher , 2 days ago
-
RE: Moving growatt axe batteries
@etchedpixels just been informed that you canāt have ba...
By David999 , 3 days ago
-
RE: Anyone have experience with Daikin Multi+ for air to air & hot water?
Maybe, just maybe, if you are prepared to leave the doo...
By JamesPa , 3 days ago
-
RE: How to heat a bathroom when using an air to air heat pump?
You can air/air a bathroom with a suitable ceiling or o...
By EtchedPixels , 3 days ago
-
RE: Plug and play solar. Thoughts?
They've been extensively tested by folks like the Germa...
By EtchedPixels , 3 days ago
SPONSORS
