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Last seen: Aug 12, 2026
For passivehaus btw you also need to consider just using an electric heater (or even a large dog) as at that level of efficiency it can be that you si...
Whats more relevant is that a badly installed air/air system has a COP of near 4. Given the kind of people who do a lot of installs this is a feature ...
Why get a battery pre-built ? 1. Because you need the tools and to know how to do it safely. Things like gloves, no jewellery etc, correct torquing ...
We already have a helium shortage so presumably they have to get this from "neat trick with helium" to product made with cheap gasses. Given how long ...
You can buy a pre-assembled 16kWh battery for about the same at this point and that's despite battery prices shooting up due to Trump (they were neare...
Not a chance given the likely next government. More likely they'd "cut" energy bills by arbitrarily revoking FIT and cancelling all feed in tariffs. A...
You can change a lot and keep a FIT but the whole thing can get to be a bit of a nightmare and will need an installer who knows the rules and likes fo...
I think the big question here will be your G100/G99. AC coupling means everything gets counted together. So 3kW of FIT, plus 3kW of AC coupled inverte...
VAT Notice 708/6. It's not as far as I am aware ever mentioned MCS and indeed many of the things it covers are simply not even MCS covered in the fi...
Is it not now referenced by BS7671 and the latest book (I'm too cheap to buy a new copy to find out). If it is as I understand then it's now got the f...
We had a nightmare trying to switch out FIT to Octopus and gave up. I don't see anything obviously wrong. You got a good G99 though!
The fix for allowing a few electric heaters is actually really important because it's common even in a full air/air setup that you'd want something li...
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@davidb I can’t help you with contacts at Vaillant unfo...
By Mars , 4 hours ago
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RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
@Ian-S, I actually think this is a pretty reasonable pl...
By Mars , 5 hours ago
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RE: Who's your electricity provider and what's your tariff?
@toodles I invested on Miele a pair of frodge frozor wh...
By AgentGeorge , 8 hours ago
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RE: Flushing system, cleaning and inhibitor
Flush and fill all complete. Octopus kindly gave us a...
By Old_Scientist , 8 hours ago
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RE: Wood burner with ASHP - direct air?
For what it's worth I installed a wood burner in this o...
By BlizzardGreen , 9 hours ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
I think I saw a diagram for an exhaust air dhw tank wit...
By JamesPa , 1 day ago
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RE: Indevolt Batteries UK Support & Info Thread
Thanks, however that's an answer to a subtly different ...
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RE: Solar Power Output – Let’s Compare Generation Figures
@toodles Such elegant symmetry. look at my lumpy bag of...
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RE: PV and battery long payback - sense check query
Quite probably not, but you can get a 32A relay and a S...
By JamesPa , 5 days ago
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I don't notice mine defrosting, and most of the time Im...
By JamesPa , 5 days ago
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RE: Do I need to change the control unit when replacing my Ecodan Air Source Heat Pump
Kind of you, @calumm, but it was @f1p who did the heavy...
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RE: Electricity price predictions
2. As EV ownershp increases it'll certainly increase de...
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