My pre-designed single part fan adapter (https://www.thingiverse.com/thing:3050632) is suitable for tighten the screws from the both side or small fans to bigger vent. If a large fan goes to a small vent, it will be difficult to screw the screws from the same side of the adapter. To solve this problem, I redesigned it with the following features:
- 2 parts adapter
- Easy to tighten screws.
- The two parts are worn together. No screws required.
- Suitable for small fan with large vent. Or big fan with small vent.
- Fan guard or grill option.
- Preset fan size from 25mm. to 140mm.
- Print test options to determine the duct fit.
- Automatic height of cone up to 45 degrees slope to print without support.
- Adjust the offset distance to match the both fan edges. The fan edges will be at the old place.