Vent covers and fan grilles sized to your opening: hex, slats, holes or rings, with the open-area percentage computed so the fan behind it can breathe.
Free and without an account: type the numbers, watch the live preview, download STL and 3MF files that Bambu Studio, OrcaSlicer and PrusaSlicer open directly. Looking for a ready-made size? The model library has 651 of them, each with its dimensions already filled in.
Type the opening width and height; the grille gets a frame that overlaps the edge and countersunk screw holes at the corners.
Hex and slot patterns reach 50 to 60% open area; the generator reports the open area for the pattern and bar width you choose.
Glue a piece of fly screen to the flat back of the grille.
Your exact configuration is attached automatically, so the bug can be reproduced one-to-one. No account needed.
The machine that generates the models seems to be down or restarting. Your settings are safe in this tab: nothing is lost. Wait a moment and try again.