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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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Degrees of Separation
Latest Posts
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RE: Where heat loss surveys seem to go against practical reality
I am amazed that there is not something out there to me...
By JamesPa , 7 hours ago
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RE: Next steps on my ASHP journey: Radiators and Pipework
@bobflux The hydraulic simulator is very interesting...
By Rob of York , 12 hours ago
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RE: 7kW EV Charger Options Advice
Thanks. Yes, we have patchy 4G. The only option we had ...
By Rusty , 17 hours ago
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RE: Being screwed over by Volkswagen Audi Group
Thanks, @batpred. That integration is the one I have in...
By Majordennisbloodnok , 1 day ago
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RE: How Accurate Is My DIY Heat Loss Calculation?
@batpred I suspect it will be more this year. I had 9 ...
By AndrewJ , 1 day ago
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RE: Surface mount or bury primaries for heat pump installation?
@jamespa It's rusting 🙂
By tomasmcguinness , 1 day ago
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RE: Glass lined Cylinder for private water supply
Thank you, once again, for your replies. Yes...
By ian33a , 2 days ago
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It’s been out a few days and Amazon has already attache...
By Mars , 2 days ago
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RE: Missing flow temperature in Heat Geek proposal
Yes, and this is another point I agree. We did find a f...
By Batpred , 2 days ago
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RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
A very good point. In effect, the DHW pipework is an em...
By cathodeRay , 2 days ago
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RE: Solar Power Output – Let’s Compare Generation Figures
@tim441 Here are those same three month periods for 202...
By Toodles , 4 days ago
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RE: Adding additional Solar Panels to a DC coupled battery system
@transparent thank you for your reply above. As alway...
By Old_Scientist , 5 days ago
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RE: Adventures in heat loss calculations
@rob-of-york — thanks for posting this, all very useful...
By cathodeRay , 7 days ago
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