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: Mar 31, 2026
Just for the record here @derek-m and @hughf I re-discovered the brochure below which I think describes the system I have (more or less) - a snapshot ...
Too funny @batalto...in our case, our geometra/ project manager and electrician conspired to order us an ASHP that drew 6kW of power in use...when the...
Hi @derek-m - thanks once again for feedback. Its clear to me now that I'll need to use the offset to adjust the WC curve and thereby produce a differ...
Hi @derek-m, Many thanks for this, most interesting and helpful. So – we have lift-off and I switched the system on last Friday evening (25/11) with...
Hi @derek-m thanks again for reply. Yes we have an ‘outdoor unit’ (‘the big fan’) and an ‘indoor unit’ (‘the big grey box’), and the Altherma ST therm...
Hi @derek-m thanks for this explanation - makes sense and provides ample background for discussions with Daikin at my end. It does sound like the sola...
@derek-m Electricity here is pretty pricey at the moment - 55c for daytime (F1 - Mon to Fri 8am to 7pm) use and 52c for all other times so there's a s...
Hi @hughf and @derek-m - below are some photos of the pipework (the insulation is awful and I'll be re-doing it this winter - promise!) and the top of...
Many thanks @derek-m and @hughf this is terrific advice and background on how this system works which has been bamboozling me for a while. I'll certai...
Hi @transparent thanks for this - yes I mis-spoke about the cold water - it may sound a bit daft but I didn't even understand until relatively recentl...
Hmmm not entirely sure that's something I wanted on my CV...oh well, it is what it is and hopefully it can still keep us warm this winter! 😀
Hi @hughf very interesting comments - I have a very limited understanding of how this all works so please forgive anything I say that seems naive! Wha...
Latest Posts
-
@david999 ... just water, David, or do you add anything...
By colinc , 36 minutes ago
-
RE: Our 10 year old Grant heat pump failed
Since my last post on this topic we've reached a conclu...
By Mike Patrick , 1 hour ago
-
Brown Oily Residue Blocking Air Vent and Weeping Relief Valve... Anyone Seen This?
My installation is 4 years old. After about 18 months a...
By seoras , 3 hours ago
-
RE: Renewables & Heat Pumps in the News
An article on funding for heat pumps in case anyone is ...
By Jeff , 4 hours ago
-
RE: Indevolt Batteries UK Support & Info Thread
Thanks @editor , @indevolt-uk Subject to any comments ...
By JamesPa , 12 hours ago
-
RE: Share Your Experiences with Heat Pump Manufacturer Support
@seoras Sorry to hear that. I found Vaillant very help...
By JamesPa , 13 hours ago
-
The Watchdog That Watched and Waited
On 9 January 2026, Consumer Energy Solutions collapsed ...
By Mars , 16 hours ago
-
RE: GSHP Kaput After 16 Years: New Compressor or Switch to ASHP? Advice Welcome
Cool Energy in Grimsby sell ground source heat pumps an...
By DerekDeLeon , 17 hours ago
-
RE: Valliant Heat Pump Settings
Thats arguably a sign of a good installer - they unders...
By JamesPa , 17 hours ago
-
RE: Electricity price predictions
Well, we have so many cases where rain water mixes with...
By Batpred , 18 hours ago
-
RE: Two heating zones to one zone
@profzarkov They arent obviously wrong, but the only...
By JamesPa , 21 hours ago
-
RE: Towns water feed to air source heat pump system
The DHW circuit cant be separated (well it could, you c...
By JamesPa , 21 hours ago
-
Solis AC-coupled 3kW storage inverter
Solis AC-coupled 3kW storage inverterPylontech batterie...
By MartinRobinson , 1 day ago
-
RE: My NIBE ASHP Nightmare: No Commissioning, High Bills and a Hostile Installer
As @transparent has observed above, this is not bad, an...
By cathodeRay , 1 day ago
-
As I was reading this article Mars, I was thinking that...
By Toodles , 2 days ago
-
RE: Tell us about your Solar (PV) setup
Installed in May 2011: 16*Sharp 245 W monocrystalline p...
By txmartyn , 2 days ago
-
-
RE: Say hello and introduce yourself
That doesn't sound 'right' to me. The national Smart ...
By Transparent , 3 days ago
-
RE: Growatt battery disconnected
I doubt this will happen, but I will try and suggest it...
By Eliuccio , 3 days ago
-
Understood. That's why I decided from the outset on a ...
By JamesPa , 4 days ago
-
RE: My experience with 3 heat pump surveys: Heat Geek, British Gas & Octopus
On the litigation, I would not go there and definitely ...
By Batpred , 4 days ago
-
RE: Recommended home battery inverters + regulatory matters - help requested
I suppose if your pv inverter packs up, you have a plan...
By Batpred , 4 days ago
-
RE: New Vaillant aroTherm Plus in black - When will it come to the UK?
Firstly check you are using sound power not sound press...
By JamesPa , 4 days ago
