Sorry did I sound agressive? No such intent!
The thing with the Velfac 200 outward opening windows (I prefer the "
sidehung projecting" when possible) is that as in the attached picture, the sash frame is aluminium, slightly larger than the window frame (which is wood), and seen from the outside completely covers and protects the window frame. This relation is what makes it impossible to model with AC's standard objects. There simply aren't enough parameters!
This also means that you get an unusually big glass area for a certain window size, and also that fixed and openable windows look exactly alike, both from inside and outside. In fact, you can,
after installation
, change a fixed window to an openable by after-market installation of hinges etc!
The transom designs also make it possible to combine frames and assemblies very freely and still make everything look like one unit/curtain wall.
The "
sidehung projecting" option in addition makes it possible to use outward-opening windows in multistorey buildings without risking peoples lives when cleaning them!
http://www.VELFAC.co.uk/projects/projects
There are designs on the market that get close, but I haven't seen anyone completely like it, so it might very well be patented, I don't know. For the projects I know, their pricing has been reasonable, even if not cheap.
You have to be very careful when you dimension them, though, and check their order confirmations to the letter! They deliver to your specs by the millimetre. Mistakes are expensive!
AC4.1-AC26SWE; MacOS13.5.1; MP5,1+MBP16,1