Window dehumidifier

Story: We have recently moved into a new apartment. It is a nice flat, but pretty old. The bedroom and living room have two rows of windows each. During the winter months a lot of humidity accumulates between those windows. In order to prevent mold we try to reduce the humidity with dehumidifiers. However, conventional ones do not fit between the windows. Therefore I have used the measurements of the granule blocks of a common dehumidifier (https://amzn.to/3Wk0iER) we had lying around.

I have used PETG for UV-resistance (because they are located at the window) but you can also use PLA and ASA filaments:

PLA:
SUNLU PLA Plus (https://amzn.to/3VDsHEC)
Amazon Basics (https://amzn.to/4cwhzAj)
GEEETECH Filament PLA (https://amzn.to/4bddAry)
ELEGOO PLA+ (https://amzn.to/3xF8M06)
eSUN PLA+ (https://amzn.to/4cyj80E)

PETG:
eSUN PETG Filament (https://amzn.to/3VNOzi0)
OVERTURE PETG Filament (https://amzn.to/3RxeFU0)
ERYONE PETG Filament (https://amzn.to/4cqbpBJ)
SUNLU PETG Filament (https://am