Louver on the wall
the profiles for louver usually similar like below:
They already come from the manufacturer with angle (oblique).
Unless you want to create a controllable angle parameter for the blades type such as below:
Then, I think you have to create a family with a parameter for it or create separate files for each angle.
To model them using a curtain wall accurately? You would need to create various Curtain Wall Panel - Pattern Based families, at least two to represent alternate alignments so that each louver can be continuous across the borders and two more for each additional size panel if your wall will contain a layout more complex than a symetrical grid of squares as I have shown. I have colored the two different panels differently so that you can see that the alignment of the louvers is different for them. These panels will have to be placed on a divided surface mass face in a new conceptual Mass family. You will need a separate, unique Mass family for each such wall or wall section. The brick and the concrete are added only for visual context.
The scope of creating this is beyond my ability to provide step-by-step instructions in a forum post. You will need to learn how to model divided surface Mass faces, and how to create and apply pattern based curtain wall panels to them. I suggest the following series of videos as a beginner's guide:
https://www.youtube.com/playlist?list=PLB5F1BB59A45C9BA9
An alternative that might be easier for beginners would be to use in-place components to model the louvers as sweeps, using the face of a generic wall as the work plane. Doing a lot of it with this method, although more simple in procedure, is likely to be more tedious in the long run than learning the divided surface method.
