This is a model that will aid in drying your filament if you are using a Sunlu S2 dryer. I assume it will work with both the fan version and non-fan version, but it was modeled with the non-fan version. The design is meant to give the humid air a path out of the machine.

It's really simple to use. Just use it as a prop between the door and base. It's designed to be printed with a 0.4 nozzle, but if you are using a 0.6 or 0.8, it may require the checking of the “detect thin walls” option on the slicer, because there is a very thin wall in the design.