Fume Extractor (dual fan)

Designed to be used with two 120mm PC fans. A 100mm aluminium hose can be connected to the output. For the input I used this hose, with a modified mount. I recommend using quality pressure optimized fans if you plan on installing a filter or having a long hose (I used Arctic P12).

For the electronics, you need:

2x  120mm 12V fans. 1x switch (11mm diameter), 1x 12V adapter and matching DC jack (8mm diameter), 1x 5mm LED, 1x 1k resistor. 

I wired the LED to act as an ON indicator (in parallel with the fans).

Printing:

All parts are already in their optimal  printing orientations. Front duct mount needs 6 M4 nuts to be inserted during the print, so make sure to add a pause. M6 knobs need M6 hex head screws to be inserted during the print. Supports are needed, but make sure “don't support bridges” is enabled, so that the inside of the print is free for the screw to fit. After the print, the sleeve around the screw should be broken/cut off. This needs to be done with 2x 50mm and 2x 25mm screws.

Assembly:

Use superglue for front duct + front panel, rear duct+ body, front duct mount + front duct, rear duct collar + rear duct. Mount the fans to the inside of the body and screw them in from the back. Finish the wiring and screw in the front panel. Glue clamp keys to the indentations on the side of the body, make sure they are at the same angle. I recommend putting the clamp keys in the clamps and using the clamps as an alignment tool. The clamps need M6 nuts to be inserted during printing. Now you can screw in the front duct using 6x M4x10 screws. Press the clamps in at the desired angle and use the knobs to secure them in.