Vento filter replacement

This is a replacement filter for the popular Vento air filter for H2 machines. Since VoxelPLA is based in the USA, obtaining these filter replacements is not economical for European based customers. This part offers a good option to simply build the activated charcoal filter yourself. The only additional materials needed are activated charcoal and an optional charcoal mat. It is advised to use steam activated charcoal, as chemically activated charcoal could lead to rust on metallic surfaces.