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Last seen: Aug 8, 2026
If by traditional system you mean uvc and by setback temperature you mean dhw target temperature then this is a good summary. R290 should be good fo...
I agree with most of what @bobflux said except possibly this: Unless your design temp is sub -5 I struggle to believe you need 18kW if this newbu...
Totally agree. However the manufacturers know that few people will sue, and the UK electorate has predominantly voted for light touch regulation - o...
Does it disappear when the heat pump is off? What about when the fan and water pump on the heat pump are running, but not the compressor(which will h...
Balancing can be a long process (it can also be very quick especially if the settings are almost right) and its possible to mess things up if you turn...
Up to a point yes. However every heat pump (and every boiler) can only turn down so far, ie it has a minimum output (which, in the case of a heat pum...
By opening up the lockshield valve on the radiator in question, or closing down a bit lockshield valves on other radiators (the lockshield valve, ofte...
Is that a single pair only? If so it may be part if the problem. How long? What flow rate do you have ( your heat pump will tell you) and what dt f...
Should be interesting. Do watch to see if the UFH gets too hot, although if it does then thats a positive outcome!
Sorry to hear that but I'm not surprised TBH. Stratification is effective in a normal unvented tank where the hot water is drawn off at the top. In ...
I wonder if heat pump manufacturers will tone these siting restrictions down. I suspect so. They aren't, so far as I have been able to establish, ac...
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Degrees of Separation
Latest Posts
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RE: Electricity price predictions
Interesting read from NESO on their Demand Flexibility ...
By Old_Scientist , 4 minutes 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 hours 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 , 12 hours 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 , 15 hours 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 , 20 hours ago
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RE: Do I need to change the control unit when replacing my Ecodan Air Source Heat Pump
One of the other mods has just reminded me that @ashp-b...
By Majordennisbloodnok , 21 hours ago
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RE: Indevolt Batteries UK Support & Info Thread
My ideal install would have my battery installed before...
By BlizzardGreen , 2 days ago
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RE: PV and battery long payback - sense check query
@old_scientist I have now drafted 2 replies - both have...
By DavidB , 3 days ago
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RE: Air source heat pump roll call – what heat pump brand and model do you have?
Forum Handle: adrian Manufacturer: Appliandirect.co....
By Adrian , 3 days ago
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RE: Acond heat pump failed after four years - diagnostic quote £940 plus VAT
@downfield Thank you Downfield. This sounds potenti...
By Mia , 4 days ago
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RE: Digest of UK Energy Statistics
@jeff Yes my brother in Oz told me of that charge year...
By Jancold , 4 days ago
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