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Last seen: Apr 25, 2026
Our planning permission has come through and the MCS levels were applied. We have to install in line with the permission. Our nearest neighbour is in ...
This site is one of the most comprehensive for what size heat pump you might need, as you may have read too big a pump can’t be less efficient T...
This is a very interesting thread. Our ashp is being fitted soon, and we’re going onto OE cosy and using our battery to charge up to get over the peak...
@transparent I did comment but I would get an E at best since I didn’t answer all of the questions in sections 1& 3 and didn’t touch 2. My input...
@roel You also may already have a buffer which can also be called a low loss header. @johnmo put in some schematics above. You might be able to trace ...
Derek’s approach (as usual) is an excellent one. You do not need a buffer, just a volumiser. Once you understand how your system balances up then it’s...
I was thinking of your analysis but I couldn’t recall who pointed it out and hence sorry I couldn’t give you credit. Sorry! There have been other st...
@pie eater the difference you can’t see will be air leakage usually. There are many assumptions about how many air changes per hour your house has due...
Aaaaaah, that’s gas boiler thinking! and the recipe for problems with ashp. As several people are explaining better then I can, an over-sized pump wil...
The reason the other heat pumps failed may be that the houses have zones, NOT good with heat pumps, and as the pumps is big then it needs a minimum wa...
Oh dear! Don't let them change radiator for lower wattage ones! There are experts on the forum who would like to see the full proposals. Can you upl...
@pie_eater our install date is in September we’ve just had some bigger radiators changed so far, (not all rooms needed larger). it is pure BS to say...
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Latest Posts
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These are a bit hard to read but the information is in ...
By bobflux , 18 minutes ago
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RE: Electricity price predictions
@toodles The octopus comms has been poor about tarif...
By Papahuhu , 25 minutes ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
Ah, not so useful then For sure, hopefully before ...
By JamesPa , 46 minutes ago
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Welcome to the forums @venkman. That's really surpris...
By Mars , 2 hours ago
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RE: Seeking ideas / information / commiseration - Pure Drive
@little-lights If I understand you correctly your syste...
By JamesPa , 3 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 , 15 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 , 15 hours ago
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Got myself in a pickle. I have two types of plugs, but ...
By David999 , 16 hours ago
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@jamespa Great, thanks - I've had a quick look at the a...
By Little Lights , 18 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 , 18 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 , 18 hours ago
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I am seeing an increasing number of occasions when my G...
By DavidAlgarve , 20 hours ago
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@transparent I have been a little reluctant to select "...
By DavidAlgarve , 20 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 , 1 day ago
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RE: Anyone concerned about GivEnergy?
Fair enough. Its interesting that opentherm (for boil...
By JamesPa , 1 day 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 , 1 day 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 , 1 day 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 , 2 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 , 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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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 , 3 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 , 3 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



