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Last seen: Mar 25, 2026
Another Vaillant user here. For the sake of correctness, the Vaillant app does not allow you change the room influence mode (inactive/active/expanded)...
Isn't that the crux of the matter? Swapping a Combi for a cylinder may require a complete replumb of much of the hot water pipework - depending on whe...
This is certainly what my system does. At the end of the DHW cycle, the diverter valve switches back to the radiator circuit, whilst there are quite a...
There has been quite a bit of discussion (mostly on OEM forums I think) that the flow/return temp sensors used by Vaillant on the Arotherm units are n...
That is, I beleive, the biggest pile of Bullsxxt ever (or at least, not the whole story). I have an Arotherm+ and have no legionella cycle configur...
I should add perhaps that will some jiggery-pokery with Python on a Rasberry Pi, and Open Energy Monitor, my EvoHome room temperatures, are all being...
@giganto I feel compelled to add my thoughts on this, if I may chip in? I too recently had an ASHP (Vaillant) installed, replacing a gas boiler. We ...
I am in the fortunate position of having independent monitoring (using OEM) of the heat pump and all temperatures. One thing I noticed quite early o...
You need to remember that the WC setting controls the target flow temp, and not the actual flow temp. The two will only be the same after a period of ...
If its only consuming 22W of electricity, then the compressor is not running at all, just the water pump. This is not 'idling', its basically off. &...
That would be 3.5kW of electrical power in. The power output into the house will at least double that - often more. A 7kW Arotherm+ will never consume...
I should add that our survey came up with a heat loss of 6.6kW - which is pessimistic. On our coldest day so far (6th Jan) it was looking like this:...
Latest Posts
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RE: Jokes and fun posts about heat pumps and renewables
Shocking.
By Majordennisbloodnok , 2 hours ago
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RE: Anyone concerned about GivEnergy?
@jostar Given the circumstances I think most folk wo...
By KevH , 2 hours ago
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RE: What is the main ‘dictator’ of Agile’s unit price?
Interesting. I am on OG Variable and the night time ...
By JamesPa , 3 hours ago
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RE: Who do I complain to about a poor ECO4 installation, can anyone advise?
@wesleyp1874 OK so the installation was paid for by ...
By JamesPa , 3 hours ago
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RE: New Vaillant aroTherm Plus in black - When will it come to the UK?
The vaillant controller and app do all of that (and mor...
By JamesPa , 3 hours ago
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RE: The Reality Behind a Failed Heat Pump Installation – and an IWA Insurance Rejection
RECC are abysmal. I was hoping it’d be HIES.
By Mars , 3 hours ago
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RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?
I read this thread from the beginning to its end.And th...
By LeJamaisContent , 4 hours ago
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And one should not underestimate the enhanced flavour p...
By Toodles , 7 hours ago
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RE: Water law settings... A year on
Yes it does Apart from the abbreviations! We're in ...
By Profzarkov , 8 hours ago
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Can anyone explain the following behaviour with a Grant Aerona 3 R30 / Smart Controller?
Occasionally, during a Set Back period the com...
By Unsure , 15 hours ago
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Very thought provoking Mars, and it just goes to reinfo...
By Toodles , 15 hours ago
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RE: 7.5kW Heat Loss, But Quoted a 10kW Midea. No Re-Pipe, No Buffer Tank. Does This Add Up?
Yes it's a shame the manufacturers make this vital info...
By bobflux , 19 hours ago
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RE: Plug and play solar. Thoughts?
News that the German VDE is widening the plug in solar ...
By Batpred , 1 day ago
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My Immersun power diverter problems now they have ceased trading
I have had an Immersun unit for 15 years that happily w...
By pjcwood , 1 day ago
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RE: Solar Power Output – Let’s Compare Generation Figures
@toodles Quite often it’s the ones that have to figh...
By Papahuhu , 1 day ago
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RE: To re-pipe or not to re-pipe? Moving from oil boiler to air source heat pump.
Hello @Penval unfortunately, now the winter is gone and...
By LeJamaisContent , 1 day ago
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RE: Grant Aerona R32 – Summer, Winter mode & Setbacks
What are you envisaging doing throughout the day? Pers...
By JamesPa , 1 day ago
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@batpred ok My energy delivered in kWh was a...
By JamesPa , 2 days ago
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RE: Global Energy Systems Thurso ASHP
Hello @outlawuk sorry, I forgot about this, important:i...
By LeJamaisContent , 2 days ago
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RE: Debugging my legionella immersion heater
@prunus Hmm 57 vs 65 does seem a way off, bu...
By JamesPa , 2 days ago
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RE: Indevolt Batteries UK Support & Info Thread
@batpred I assume you plugin the battery on a wall sock...
By ChandyKris , 2 days ago
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RE: Grant ASHP keeps switching on every hour
Frankly I have no idea how a room thermostat is ever go...
By JamesPa , 3 days ago
