Box.png
Kallax.png
Hmmm I'm not sure what you mean by vents on top of glass doors.
Here's my Kallax with the vents in the back. The doors at the front will go into those white rails at the front and the bin that I have added a photo of will have a glass at the front as well. I was planning to add more little holes at the back of the bin (like the 1 row of little holes at the top in the back (the 9 bigger holes have a plexiglass over them in the back).