Fan Duct Damper 120mm

I designed this thing for my Lack enclosure. It covers a rear mounted 120mm exhaust fan to prevent heat loss when the fan is not needed, and opens to direct hot air upward when the fan is moving. The flapper is 0.6mm thick to keep it light and responsive, which works well with PWM+PID controls.

The hinge holes for this thing are designed for 1mm wire. After printing, heat your hinge pin wires and push them in to the flapper. This provides a solid bond to the flapper, and allows some flexibili