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Last seen: Aug 10, 2026
Your installer is probably right. The L9 error means low flow, and if the zones aren't open this will be the reason. You cant fix the error without ...
Im sure there are plenty of gags to be had linking MCS and rodents of various types!
Thanks everyone, this is going to take some analysis so it might take a while before I respond fully. Of course any further inputs are appreciated! ...
There is room outside but only the other side of the house to the garage. The CU is in the garage so it would require a long run of cable to connect ...
Thanks. The concept of daisy chaining the inverters is attractive in principle as there is no ambiguity what's happening! It also makes for a simple...
Thanks. The concept of daisy chaining the inverters is attractive in principle as there is no ambiguity what's happening!
I agree. I have been advising another user with a Hitachi heat pump and that does have the ability to program more complex wc curves. Given how the...
Thats quite plausible particularly with radiators. Radiator output is not a linear function of surface temperature unfortunately, its (usually) pro...
My consumption figures, for a house in the South East that has a measured loss of 7kW at -2, are here My SCOP is roughly 4, but of course in...
Its not really a downside of ASHPs, its a downside of using weather compensation. Boilers with WC have exactly the same limitation. Other than t...
The Sunny boy is old enough that it should be considered dumb for all practical purposes. It limits its own output to 16A (measured at its own output...
Doubtless its possible but Im not currently sure its necessary or even desirable. You have plenty of kit much of which is unnecessary and unhelpful, ...
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Degrees of Separation
Latest Posts
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For some odd reason I cannot even register for that. ...
By Batpred , 11 minutes ago
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RE: Indevolt Batteries UK Support & Info Thread
@indevolt-tech When you say 'dedicated switched fused ...
By JamesPa , 55 minutes ago
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Agreed. Manufacturers minimum is just enough in theory...
By JamesPa , 1 hour ago
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RE: Electricity price predictions
I'm very much grounded in systems too, so I think we're...
By Majordennisbloodnok , 3 hours ago
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RE: Do I need to change the control unit when replacing my Ecodan Air Source Heat Pump
Unfortunately the answer is Yes you will need a new FTC...
By F1p , 22 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 , 23 hours ago
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RE: HomeTherma Is Live: A New Home-Energy Platform Built Around the Homeowner
Signed up!
By bobflux , 1 day 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 , 2 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 , 3 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 , 3 days ago
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