Exhaust Fan Kit - 90° elbow with air trap

I designed a custom exhaust air duct connector that connect to the External Exhaust Fan Kit - P2S the main difference is that my design uses a 90° elbow configuration, adapted to my specific installation constraints. This can be mounted so that the elbow is in any of the four quadrants. However, if you mount it vertically, you should not use the trap. This is OD 4" (10cm)

Check also this project it is very similar with a lower profile https://makerworld.com/en/models/2506901-exhaust-fan-kit-90deg-elbow-trap-optional-fnatr#profileId-2898776, I consider an evolution of this project started to be used with a FNATR filtration system but improved overtime, up to you to decide which one to pick.

In addition, I incorporated an internal air trap / backflow limiter, whose purpose is to reduce cold air or unwanted airflow returning into the system when the exhaust is not active. This feature is not present in the original model and was specifically added to improve efficiency. This should be used only when mounted in horizontal.

The geometry, dimensions, and internal structure were independently designed and do not reuse or modify the original digital file. My goal was to create a functional solution tailored to my setup, not to replicate or redistribute the original design.

You can find a smaller set of pins, since one is very hard to insert because it has a very tight size. In the profile, it is the one placed in the S shape.

Please have a look at my other projects : https://makerworld.com/en/@VoIP