3" dryer hose to 120mm fan connector

Fits on a 120 x 120 print bed.
Designed to use m3 or m4 hardware (holes designed for m3 threaded inserts)
20mm m3 bolt used but can vary depending on the particular fan

Bolts directly to fan, would benefit from a filter box or shroud between fan and adapter to prevent fan damage if parts are sucked in.

Designed with a post and collar connection that fits a 3" dryer hose. Fit is a tad tight on the post but if it doesn't fit, true up the circular shape on the end of the hose, twist on and apply pressure.

It will also work with a hose clamp, the post wall is 4mm thick so the amount of pressure it can take will depend on your layer adhesion, wall settings, and infill percentage.

Wiring diagram for one possible design route included.