100mm (4 inch) - 150mm (6 inch) duct adapter with inline fan

Adapt your 100mm (4 inch) air duct to a 150mm (6 inch) duct, with option to add an inline 140mm PC fan.

To install:

1. Print one of each part
2. Insert M3 threaded inserts into the 4 outer holes on each side of the middle piece
3. Use four anti vibration mounts to install the fan to the middle bracket. They look like this:

4. Push the fan cable through the hole to the outside

5. mount both sides with 8X M3x6 screws. (4 each duct side)

6. Tape across the sides over the gap with some strong, air tight tape of your choice.

7. Install ducts onto mounts. I recommend some of these.

8. Use duct tape over the top if needed to seal.

9. Connect fan to a 12v controller. Can be found here

I recommend either: this or this (depending on your electronics skills)