CPU/board fan silencer (Ender 3)

I have combined three ideas together:

• air duct goes to the back (https://www.thingiverse.com/thing:3991193)
• reduce the noise with shock of the air waves in the inner fins (rungs) round holes (https://www.thingiverse.com/thing:4251317)
• bed level reminder on top (https://www.thingiverse.com/thing:3505548)

Noise is directed to the back of the printer - I measured noise reduction about 6 db!

Basic version has length 10 cm, extended version 12 cm.

I just used black marker to highlight the text.

Check also my fan silencer for power supply unit: https://www.printables.com/model/44686-power-supply-psu-fan-silencer-ender-3

Please share your makes and send me your thoughts about this thing!

Print instructions

Infill: 15%
Support: No
Enable Bridge Settings: Yes (Cura - Experimental)