For ventilation we chose a MaxxFan Deluxe smoke edition. It runs on 12v and uses 2 - 4.2 ah depending on the setting of your fan.
It can ventilate fresh air in or out, and can be closed manually in case of a malfunction with your 12v system.
The installation was done by an outfitter together with the tainted windows.
10 fan settings
2 - 4.2 ah
Size for the cut 40 x 40 cm
Diameter 30 cm
MaxxFan Deluxe smoke edition
Sikaflex 221 Black silicone