PolyDryer Air Exchanger

Simple vent extensions for the PolyDryer, that allow fresh air exchange to reduce humidity and speed drying.


Most 3d printing filament dryers have a fundamental flaw:
they heat the filament and pass air over it, but they are a closed system with no venting, so moisture escapes only by accident.

With single piece dryers, fixing this is intrusive - you have to modify the dryer itself: [Sunlu S1 Filadryer Turbo Mod](https://www.youtube.com/watch?v=5jCVT0lXKyU).
The PolyDryer being modular, allows for a non-intrusive approach.

The result of allowing a measured amount of air exchange between the dryer and the ambient, is that it reduces the humidity of the air in the dryer more rapidly, greatly reduces condensation build up within the case, and improving drying speed.

I provide two versions of this print, a 5% and a 10% air exchange.
The 10% versions seems close to optimum for the stock PolyDryer.

Best printed out of ABS or PETG for temperature resistance, with supports.

I also modif