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Last seen: Apr 4, 2026
Hi Patrick In a word yes. If you want an efficient heat pump system then you need to set the flow temperature as low as possible while still providi...
@johnnyb So my controller does shut off the heating when it gets to temperature, but most of the time the WC curve controls it so it doesnt happen. Th...
So a second update to incude Nov and Dec. The savings that would be made by adding a second 5kWh battery module would be £63 so far. If I could fit a ...
Sounds perfect 🤩
@raiph there is some info on 2094 here.
@johnnyb It sounds like you have got a good handle on this now and the reasons why its not performing well are getting fewer and fewer. Some kind of m...
@mike-h Yes, totally agree about false reassurance Mike. I was thinking that an error would always be in the same direction but I guess that doesnt ha...
@johnnyb No problem, glad it helped. So what flow temperature were you using on the heating last night? UFH is known to have quite a bit of hysteresis...
@mike-h Im not sure I follow you Mike. I can see that external temperature probes may differ from internal, especially if there is a long pipe run. ...
I think the low dT is a consequence of the low flow temp you are trying to use, 1.5-2 is small but although a dT of 5 is often cited as optimum, i don...
@johnnyb Thanks :-). I’m off out on a Xmas do tonight but will sit down and try to answer as many of your questions as I can tomorrow.
@johnnyb This formula does seem a bit contenious, but the results do seem to me to be closer to what is expected (obviously not to everyone though see...
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RE: Indevolt Batteries UK Support & Info Thread
@jamespa and @colinc to my understanding, the way a plu...
By Mars , 25 minutes ago
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@cathoderay I turned the room stat down to 12 degrees e...
By Painter26 , 49 minutes ago
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RE: Electricity price predictions
@jamespa I definitely made full use of the Cosy tariff ...
By ChandyKris , 4 hours ago
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RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?
@judith unfortunately, I completely missed your reply u...
By LeJamaisContent , 4 hours ago
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RE: Seeking ideas / information / commiseration - Pure Drive
That may well be correct. However we don't have enoug...
By Transparent , 8 hours ago
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RE: Rate the quality of your heat pump design and installation
@editor Thank you. I joined because I really liked your...
By claireisamazing , 1 day ago
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I cant, but @editor probably can if you tell him roughl...
By JamesPa , 1 day ago
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RE: UK DIY Battery: SEPLOS 48V 200Ah x2 + Sunsynk 8K – Safe Installation for Garage Conversion
@madsid I don't quite understand what extra you need...
By Bash , 1 day ago
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@transparent thank you. Be Thursday before my mate giv...
By David999 , 1 day ago
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RE: Peak Energy Products V therm 16kW unit heat pump not reaching flow temperature
@johnd our Peak system is no more. The installer cam...
By DaveC , 1 day ago
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Hah! Well I guess we're all in the realm of conjectu...
By Transparent , 1 day ago
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These are a bit hard to read but the information is in ...
By bobflux , 1 day ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
Ah, not so useful then For sure, hopefully before ...
By JamesPa , 2 days ago
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Thanks @editor I appreciate that things go wrong, bu...
By venkman , 2 days ago
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RE: Home energy storage & battery register
AC coupled Pure Drive 10kW battery Solar PV Solis P...
By Little Lights , 2 days ago
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RE: Air source heat pump roll call – what heat pump brand and model do you have?
Forum Handle: ispookie666 Manufacturer: Vaillant Mo...
By ispookie666 , 2 days ago
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RE: A2A vs A2W: Which Heat Pump Would You Pick?
I'm fairly new to the forum and have not voted. Back...
By ispookie666 , 2 days ago
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I am seeing an increasing number of occasions when my G...
By DavidAlgarve , 2 days ago
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RE: End-of-Life Heat Pumps: How Do You Dispose of an ASHP in the UK?
@editor Thanks Mars. I look forward to the subsequent ...
By DavidB , 3 days ago
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RE: Anyone concerned about GivEnergy?
Fair enough. Its interesting that opentherm (for boil...
By JamesPa , 3 days ago
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RE: Brand and installer questions for ASHP
A tank solely in the return (upstream of where the retu...
By JamesPa , 3 days ago
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RE: Home automation and the cloud; is there a better way?
+1 It's not just cloud though. Many devices have repla...
By bobflux , 3 days ago
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RE: Summer usage. Why is my Vaillant Aerotherm using so much energy on "heating"?
So the red bars are 'DHW' and the yellow bars 'heating'...
By JamesPa , 3 days ago
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RE: Renewables & Heat Pumps in the News
Critics and naysayers will be negative whatever the gov...
By JamesPa , 4 days ago



