FumesORT

This filter for fumes is mounted under the bed.
The volume of the filter basket is approx. 313ml and is filled with activated charcoal pellets.
The pellets I used have a diameter of approx. 4mm.

Two 40x40x20 Sunon MF40202VX-1000U-A99 are installed in the supply air and exhaust air ducts, which circulate 37m³/h with an empty filter and 11m³/h with a full filter basket (you could also operate the 24V Sunon with 12V and then still get about 6m³/h circulated)

I also included the middle piece of supply air and exhaust air as a STEP so that you can vary the length of the filter.
The current lengths are designed for a 315

BOM

20x M3x8mm or M3x10
16x M3x25mm (for 40x40x20 mm Fans)
2x wago 221-413
8x M5x8mm Socket Head Screws
8x Hammer nut M5 for 2020 profil
4x Hammer nut M3 for 2020 profil
1x 295mm 2040 profil
4x 40x40x20 Fans
1x activated charcoal pellets