There is a dual filter cartridge, box for 80mm fan. The best example of use is a 3D printer housing. Install this filter box inside the enclosure, over the fan output.
This box is a housing for two filter sandwitch. The first is HEPA filter cartridge, the second is a cutout of carbon active filter. The goal is to reduce as more as possible the VOC while printing.
HEPA filter i use is the Kenmore 86889 (5.9"X3.8"X0.5")
Carbon active filter i use is manualy cutout of VEVA Premium Carbon Activated Pre Filter