PolyDryer Air Exchanger

This is an air exchanger for the Poly Dryer drying system. The theory is to have a larger opening to let moisture laden air escape which requires an inlet to allow ambient air to enter (to minimize any vacuum effect). This has been discussed in forums and those with fancy measuring equipment have noticed a measurable decrease in drying times. This was originally designed by gwg_2538727 on Printables. The original and some discussion can be found here: https://www.printables.com/model/1048454-polydryer-air-exchanger. Since they don't have a presence here on MakerWorld I am sharing their work to simplify things for other Bambu users. The two different models (5% and 10%) have pieces that are both labeled “front” and “back” for their respective mounting positions on the dryer. The inlets and outlets are shaped accordingly. The size of the inlet/outlet is double on the 10% version compared to the 5%. Printed on a P1S with Bambu PETG HF in Gray. If drying any hi temp filament, printing