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Last seen: Apr 25, 2026
When our condensing boiler was fitted 14 years ago (too big but who cared?) we were told very clearly that it only needed to be on high when winter wa...
Vaillant service for the application installation was great, one engineer visit and 4 extensive replies from the help desk. BUT tbh it should have bee...
Heatpunk is very good and I was able to get an accurate result from thatwhich agreed with the sanity check of the annual gas bill. if you want to do...
I think I have only just understood a point that I think @transparent has made a couple of times. As a direct consequence of there only being one U...
We’ve just had a Vaillant installed (literally finished today) and the installer (Heatgeek elite) and Vaillant support has been excellent. So personal...
A separate reply about ventilation. The heat loss survey method includes heat loss through ventilation both deliberate and unplanned (otherwise know...
I totally agree with James’ approach of keep the heat pump running continuously during the coldest periods and use set back for overnight lower temper...
Our battery is connected to the mains via the AC3. The solar also connects to the mains separately which is 4kW of panels with a Sunnyboy “FIT” system...
Our AC3 gives 3kW output nominal and I’ve never seen more, certainly not up to the 4kW you state our battery can export. Your output power capability ...
@transparent we have a G99 for our 6kW PV panels and 9.5kWh battery and although we try to use all of our PV we export about 20% of it and it provides...
Our minimum usage in the night is ~150W but mostly it is more. Usual suspects WiFi mesh and extenders tend to dominate, inc MVHR. When we’re not here ...
Do we need to challenge personal circumstances on here? Surely not?
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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 , 5 hours 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 , 5 hours ago
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RE: Home energy storage & battery register
AC coupled Pure Drive 10kW battery Solar PV Solis P...
By Little Lights , 8 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 , 8 hours ago
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Got myself in a pickle. I have two types of plugs, but ...
By David999 , 9 hours ago
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@jamespa Great, thanks - I've had a quick look at the a...
By Little Lights , 11 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 , 11 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 , 11 hours ago
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I am seeing an increasing number of occasions when my G...
By DavidAlgarve , 13 hours ago
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@transparent I have been a little reluctant to select "...
By DavidAlgarve , 13 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 , 18 hours ago
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RE: Anyone concerned about GivEnergy?
Fair enough. Its interesting that opentherm (for boil...
By JamesPa , 18 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 , 18 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 , 19 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 , 3 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



