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Last seen: Apr 25, 2026
I totally agree that K2 are worth it. They don’t look very different to K1 or P+ and are SO much more effective. Moving to K3 is a different step in b...
I have no connection with them whatsoever but why not ask Brendon atfor advice & replacement? You’re in Cumbria and he’s well respected in the ind...
If you go into system view on the app it shows flow temperature and you’ll easily see the DHW heating which ramps to become above your DHW set tempera...
We have a 4kW array and a Sunnyboy inverter (still working very well from original) and FIT. You need to ensure you get an AC coupled inverter into th...
If after reaching its minimum level continuous operation it cycles cleaning 80% on 20% off in an hour gradually reducing its on period to just ~15min...
For my part I was overwhelmed with the total number of questions. So I’ll answer a simple one: if one ufh zone is colder then yes you get it warmer ...
I think a room by room heat loss is a first step but with authority/discretion to include known upgrades without full documentation (one idiot would-...
If Vaillant produced a list of all of their various variables that would be valuable!
A snapshot of our 7kW Vaillant was at an OAT of 18C producing 1.1kW with 40% of the time on & 60% of time off. The lowest in continuous production...
We get extra heat loss on wet and windy days too, even the best heat loss model, the passive house one (which does allow for solar gain and shading) d...
I too would like to read Vaillant’s explanation since it seems to just be a marketing gimmick on gas boilers and the sensocomfort is to be used on all...
First “no blower test above 1ACH”. If these are done on a building site on a typical design, once this passes the rest of the houses are built the sam...
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Latest Posts
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
To be fair to Octopus customers, it would be better if ...
By AndrewJ , 39 minutes ago
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RE: Seeking ideas / information / commiseration - Pure Drive
Most of the times whole house backup can't work without...
By bobflux , 42 minutes ago
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RE: Home energy storage & battery register
AC coupled Pure Drive 10kW battery Solar PV Solis P...
By Little Lights , 3 hours ago
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RE: Rate the quality of your heat pump design and installation
@claireisamazing, that’s got to be one of the most posi...
By Mars , 4 hours ago
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Got myself in a pickle. I have two types of plugs, but ...
By David999 , 4 hours ago
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@jamespa Great, thanks - I've had a quick look at the a...
By Little Lights , 6 hours 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 , 6 hours 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 , 7 hours ago
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I am seeing an increasing number of occasions when my G...
By DavidAlgarve , 8 hours ago
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@transparent I have been a little reluctant to select "...
By DavidAlgarve , 8 hours 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 , 13 hours ago
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RE: Anyone concerned about GivEnergy?
Fair enough. Its interesting that opentherm (for boil...
By JamesPa , 14 hours 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 , 14 hours ago
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RE: UK DIY Battery: SEPLOS 48V 200Ah x2 + Sunsynk 8K – Safe Installation for Garage Conversion
thank you to all who have already replied. I have been...
By madsid , 15 hours 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 , 1 day 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 , 2 days ago
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RE: Indevolt Batteries UK Support & Info Thread
Have you tried cutting the grid feed to see what actual...
By JamesPa , 2 days ago
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Contractors pack for inta antifreeze valves are around ...
By ASHP-BOBBA , 2 days ago
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RE: Renewables & Heat Pumps in the News
Critics and naysayers will be negative whatever the gov...
By JamesPa , 2 days ago
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RE: Microbore heat pump installs
In principle you are almost certainly right, but in pra...
By JamesPa , 2 days ago
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RE: Electricity price predictions
@old_scientist We are a low mileage home, so bulk of ou...
By ChandyKris , 2 days ago
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RE: What is the main ‘dictator’ of Agile’s unit price?
@toodles I keep an eye on wholesale prices and energy m...
By ChandyKris , 2 days ago
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RE: Upgrading my system, how far do I go?
For comparison, my PW3 with 11.04kW inverter, will char...
By Old_Scientist , 2 days ago
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RE: Changes to Tesla Powerwall Charging Regime?
Elon gate - legendary! I take my hat off to you @toodle...
By Old_Scientist , 3 days ago


