Hotend Fan Silencer for Ender 3 Pro

thingiverse

- First, I printed a fan silencer for my power supply... surprisingly effective. - Then I got a 4.2.7 silent board... amazing, not even the same printer anymore. - Now the fans on the hotend are all I hear, and it seems there is not a single good solution on thingiverse. Until now. This is a simple intake duct that covers the front 4010 axal fan (which cools the hotend) and the side blower fan (which cools what you're printing). This design has plates which sit 0.3 mm below the actual part, which acts kind of like the raft you print on your build plate. It sits on top of the supports but is intended to separate away from the part really easily. After the first print warped away from a true 90, I beefed up the side thicknesses a bit and made the angle between the two fan covers 89 degrees. It should give a snug fit now, but you will notice lines where you get a layer step every 10 mm or so on the part with 1-degree of tilt, so don't freak out when you see it. This part made a very noticeable difference to me, but I haven't quantified it with a decibel meter or anything. The fan on the bottom of the printer which cools the motherboard is definitely my loudest component now, so I guess it's next.