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I plan to do this internally, where I have the space available - I don’t have this option externally.

The thermal property of tilebacker boards is nowhere near comparable with aerotherm though.

Is this aerogel or spacetherm? From the suppliers I’ve approached, aerogel is like a stiff board/sheet (these pictures look like a loose fabric). It appears that the term ’aerogel’ is used across a variety of products, but not all with the same thermal value.

I have 9 supply and 6 extract of 90mm Ubbink, which is what those pictured above seem to be. My MVHR unit is in the loft. To get from the loft to the ground floor ceiling i had a double stud wall designed into the Potton kit with a 100mm gap. This allowed me to hide the vertical drops neatly. Potton said ' oh thats a good idea'. Manipulating the ducts 90 degrees to get them into the Posi joists at the ground floor ceiling was the hardest bit. And remembering to lay them in the correct order such that they weren't needing to cross each other as they distributed away to the ground floor rooms. The trick is ,you need to try to get the twists out as you go because its a total bastard to think ' i'll sort that once its in'. Ask me how i know. Only other real issue was trying to remember and calculate what end pieces and joins you might need to clip it all together. Waiting for the little bits that you forgot to order is painful. I have to say the Ubbink ducting is brilliant. If you ever played with Lego as a kid you will appreciate the way it just works and clicks together 'just so'.

Or a more modest normal install. I have a 5 flow and returns on one unit and 2x on the other.

No, and I think it’s sold now. I see there are other machines on eBay thougn.

Lots of data here. https://www.ukgridlive.co.uk/

Made them all myself on site. 4x 160’s over the office to outdoors (vs out next to the front door, yuk!) to 2x 200 (1 per unit), probably lost 2 pints of blood with all the sharp edges…..all part of the ‘fun’. Doubled up on the black rubber o ring seals and then 2 full turns of AT tape for good measure. And in the plant room posi joist voids I made 2 more 200> (x)qty 100mm ‘manifolds’ which were facing upwards, for supply and extract on the 1st floor. Where it was near impossible to apply the foil insulation to the fresh intact I just used cans, lots of cans, of expanding foam aka Kingspan in a can. Mummified it as you can see, to deal with 0°C incoming air temps / condensation control. Air-tightened with FM330 and green smartply, so MBC could tape to my bits without losing any integrity (scored 0.35ACH on the test last week ). Zero need to get into these ever again, as the distribution systems are all zero maintenance.

I made insulation corners a bit bigger than the tape lines to enable lots to wriggle room. Once screed had cured, broke out the insulation. Did what I needed when bathroom etc was being done, then back filled with cement mix.

JESUS! As we struggle to maintain 60fps with SO much more added an optimisation loop again. Every trick I can think of discussed with Claude. Gained 30% again!!. Now to use that on expensive effect! Terrain can cast shadows!. That will make it look like the bollocks with bollocks on it looking at bollocks with golden bollocks.

National grid live feed in the battery app.

There’s no way in hell I’d have got 200mm > 160mm > 100mm spiral metal ductwork in here, plus all the soil and waste pipes, just zero chance. I prefer the radial as I can fit the stuff in pretty much with zero impact on the layouts, and zero cross talk etc. Seems to run a lot quieter too; this one is a whopper of a system but is absolutely completely inaudible in the rooms on 25% fan power (not commissioned yet, but I expect we can run closer to 20% on trickle). Pulling these flexible (enough) ducts in, one by one, needs thought but is relatively easy for 2 people. Don’t dream of doing this on your own as that’s just too much hard work. It looks ‘lots’ because it is! 40 ducts in total.

Get some neoprene insulation material 100mm wide, wrap this around the soil pipes at screed level. 2 wraps around will leave you with a void around the pipe so when the screed is in and dry you will either have a bit of wiggle room on the pipe, or you have the ability to pull the neoprene out which leaves a void that a pipe coupling will fit into. as for sealing them you will be putting your dpm on top of the beam n block so you seal the pipes to that.

@SimonD if you dont mind me asking what kind of problems do you need fable to look at??. I'm doing a super advanced 3d engine that basically makes 95% of game ones look shit - so I'm curious what task you are doing that requires even more umph than opus (only answer if it's ok of course). I'm just thinking "WTF is HE doing!"

Cost me an F'ing fortune I bet!. But as I said competitive nature of these firms models getting better, hardware costs will come down, more people use it then costs per user must decline. I read something interesting; people are quite loyal to say netflix,apple tv, even sometimes ISP - but for AI no one gives a (expletive deleted) and we whore about for the best deal. If I did a frontier cloud AI I'd name it "Susie does". I reckon I'd pick up a couple of million subscribers from day 1.

Interesting - where can/did you get those figures? 80% of Scottish demand wouldn't be far off the 2.5GW of wind total?

Ah, yes okay. I think the odds are that's the way it'll go probably and it could be a good thing.

Oh I didn't mean free I just meant no subscription but paid API i.e. pay as you go!. Honestly though visually I'm flabbergasted at what can be achieved. But I keep adding more effects and tanking frame rate so another round of optimisations!

I'm sure it is and I bet it also depends on the tasks, but I think Claude is pretty good. Today I've use 6% of my weekly total and 8% of my Fable - and that's dealt with some fairly complex reasoning rather than coding itself. I can keep tabs - but maybe that was different with chat? TBH I think what I get for my subscription is pretty good - I've hit my paywall only a couple of times but then in fairness I'm usually due a break anyway so I consider it a health check 😊. I doubt they'll offer it for free, even if it would be amazing if they did.

As long as the secondary RCBO can trip without the main RCBO also tripping, if it does trip then mains power the relay base power is also cuts out. So question - does the second RCBO actually serve any purpose. Wouldn't you just kill the house power in total if you have a fire not faff with this bit and not that bit. If it's electric related fire your main RCBO is going trip anyway pretty quickly. You may be overthinking making it to complex it as you say to others

@Nickfromwales So your distribution boxes are hidden behind walls if I understand the diagram and the photos. Ours ended up being above the (lowered) plant room ceiling (daft fire concerns as there's no gas) But.... If you do need to clean each inlet and outlet connection through the semi rigid pipes, how do you do this? Or is it not considered necessary?

Depends where you are our current mix from National Grid in NE Scotland is 80% wind and 20% solar at 2pm

https://www.theguardian.com/environment/2026/jul/09/great-britain-grid-operator-issues-another-warning-over-power-supplies-in-heatwave Interesting bit is how the French are having to curb the output of their nuclear stations due to the high temps. The same issue can also affect gas stations. And as the anti-renewable brigade never tire of mentioning, low wind conditions can coincide with heatwaves and drastically reduce the output of wind farms. Right now (1.30pm 9th July) wind is only producing 2.5Gw, about 10% of it's maximum and 1/3 the current gas plant output. Of course, there is one tech that correlates extremely well with heatwaves.... Solar, and that is currently pumping out 14Gw. My own array is powering my portable air con unit and the battery will continue to do that well into the night. Zero impact on the grid. In contrast to the challanges facing renewables in our winter peaks, solving for the likely summer peaks is much easier. Lots of PV, local and grid scale, lots of batteries, local and grid scale.

This is funny! I screen grabbed a shot for Claude to look at. Unbeknown too me my buildhub page was showing so it got to see my 'signature'. Here's what it said "The note "hoping some hair will grow around it" — if you mean you want vegetation/scatter around the feet to hide the leg-terrain junction, that's a separate feature (prop-adjacent vegetation scatter) I can look at. Want me to?"

like the Gateshead flyover in Newcastle, they are demolishing the entire thing. And closer to home, the National Glass Centre in Sunderland is about to get demolished, 25 years after it was built, pretty pathetic.