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Last seen: Aug 10, 2026
@transparent Thanks perhaps mine is G83, cant actually recall (I will check). Its a SunnyBoy SB4000 I have PV, Im considering a...
I think it is most unlikely indeed that it cant run on pure WC, there will almost definitely be a config/wiring option to disable room influence entir...
Firstly you need to recognise that December through February are very cold and so you will inevitably have MUCH higher bills in these months, probably...
@transparent thanks thats really helpful, particularly the diagrams. In the G100 case I presume that the inverter must be specifically G100 certified...
In this case you need to use average OAT and energy supplied to the house (as opposed to energy consumed) to do the calculation. You then get the los...
If you consume 10kWh in 3.5 hours at a COP of 2.5 then the 'calculated heat loss' is 10/3.5*2.5=7.1kW which quite plausible. However 3 Hours is pro...
Subsequent to writing the above one more niggle occurred to me. Whilst you set up the upstairs you need to ensure that the heat pump isnt disabled be...
On the contrary you are asking all the right questions and providing well thought through answers. Its going to be difficult to give a 'prescription'...
@green_fox Excellent information and pictures and wow you have got a lot of kit. A couple of observations and then (sorry) a couple more question...
OK so all you actually need is a call for heat on/off, temperature measurement and remote access. Thus not necessarily a heat pump or even a heating ...
Can you tell us what the weather compensation settings are please and also is there a buffer tank/LLH or (separate question) a volumiser. Have you go...
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Degrees of Separation
Latest Posts
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The "thermal comfort" we feel is a mix of air temperatu...
By bobflux , 17 minutes ago
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RE: Do I need to change the control unit when replacing my Ecodan Air Source Heat Pump
@majordennisbloodnok - thanks so much. That has been...
By CalumM , 8 hours ago
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RE: Electricity price predictions
2. As EV ownershp increases it'll certainly increase de...
By EtchedPixels , 10 hours ago
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I meant to say I cannot register my kit at Energyplus… ...
By Batpred , 11 hours ago
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RE: Indevolt Batteries UK Support & Info Thread
@indevolt-tech When you say 'dedicated switched fused ...
By JamesPa , 16 hours ago
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RE: PV and battery long payback - sense check query
So if it helps I was recently quoted about 8 grand for ...
By EtchedPixels , 2 days ago
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RE: HomeTherma Is Live: A New Home-Energy Platform Built Around the Homeowner
Signed up!
By bobflux , 2 days ago
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RE: Has anyone seen this problem before? Huge anticycling times
Oh dear. Glad it was replaced. I have been mighty imp...
By JamesPa , 3 days ago
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RE: Can I start an argument about buffer tanks please? 🙂
Dont, just adjust the LSVs to get different temperature...
By JamesPa , 3 days ago
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RE: Heat pump running costs – what has actually worked for you?
I installed the air source heat pump in January 2026, i...
By bobflux , 4 days ago
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RE: Grant Aerona Air to Water R290 6.5 kW - Quiet Mark and Silent Running
Thats all interesting. DHW on my Vailant seems to respe...
By JamesPa , 4 days ago
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