Fri, 14 Aug 2026 16:55:12 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310622#Comment_310622 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310622#Comment_310622 Mon, 11 May 2026 21:04:47 +0100 chrisinbrighton It appears to last way longer than sealed units and a lot better performance.
My only concerns are how visual the small spacer dots are and the width of the packer.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310632#Comment_310632 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310632#Comment_310632 Wed, 13 May 2026 05:27:48 +0100 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310635#Comment_310635 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310635#Comment_310635 Wed, 13 May 2026 06:48:39 +0100 fostertom https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310650#Comment_310650 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310650#Comment_310650 Thu, 14 May 2026 15:43:31 +0100 tony
Vacuum units on the other hand are effectively trying to suck air into the vacuum void and this will happpen more quickly]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310651#Comment_310651 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310651#Comment_310651 Thu, 14 May 2026 18:46:50 +0100 WillInAberdeen
As far as air is concerned, an Argon filled unit _is_ a vacuum, that would suck in air even if the argon couldn't get out.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310653#Comment_310653 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310653#Comment_310653 Thu, 14 May 2026 20:27:12 +0100 fostertom Posted By: WillInAberdeenan Argon filled unit _is_ a vacuum, that would suck in air even if the argon couldn't get outNot so much sucked in, more a place of empty refuge where all the other molecules that make up air, rush, from the unbearable crush of their various kin.

I always wonder - how does an argon molecule pick out all its mates across a crowded room, ignoring all others? Do they put out signature vibes, unique to their gang? (and then try and get as far away as possible from each other)]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310654#Comment_310654 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310654#Comment_310654 Thu, 14 May 2026 20:57:43 +0100 WillInAberdeen
Someone famous put it like this:

"imagine emptying a set of chess pieces from height onto a chess board. What are the chances that the 8 white pawns all land on their 8 correct adjacent starting squares?

"It's unlikely, they're more likely to be jumbled up with other pieces across the board.

"Now do it again with 10^23 chess sets. What are the chances that every one of those 8E23 white pawns (argon atoms) all land on only those 8 squares and nowhere else?"


There's no law that says the squillions of argon atoms in a windows _have_ to diffuse away from each other - the it's just more likely they will do that, than that they all happen to land up in the same place.

https://en.wikipedia.org/wiki/Entropy_(statistical_thermodynamics)]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310655#Comment_310655 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310655#Comment_310655 Thu, 14 May 2026 21:10:58 +0100 fostertom https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310656#Comment_310656 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310656#Comment_310656 Thu, 14 May 2026 21:39:21 +0100 WillInAberdeen
Remember reading reviews that the glass vacuum panels are pretty good, dots not visible.

Each piece is cut to size in the factory and vacuum is applied and then the edges of the piece are melted together (welded). So a better seal than on a double glazing unit .

But - because the glass is quite thin - the bypass heat loss path round the edge of the glass through the frame bypassing the glass is quite short - so you get more bridging losses through the frame than you do with DG. Might reduce the attraction.

Also back then it sounded like you had to send measurements off to the factory in Japan to get each pane made to order and sealed, don't know if they make it in UK now?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310658#Comment_310658 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310658#Comment_310658 Thu, 14 May 2026 22:17:12 +0100 fostertom https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310660#Comment_310660 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310660#Comment_310660 Fri, 15 May 2026 09:09:04 +0100 djh Posted By: WillInAberdeenBut - because the glass is quite thin - the bypass heat loss path round the edge of the glass through the frame bypassing the glass is quite short - so you get more bridging losses through the frame than you do with DG. Might reduce the attraction.Presumably you also get greater edge losses because the conductive path is solid glass rather than an insulating seal? No idea about magnitudes.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310664#Comment_310664 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18432&Focus=310664#Comment_310664 Fri, 15 May 2026 09:26:06 +0100 fostertom