Building an "Airtight" case with carbon filter.

[MolecularConcept]

unless your standing over the machine huffing the fumes i really dont think you have anything to worry about. but a case is always nice for keeping the heat in and drafts out.

and unless your carbon layer is really thin the air might bypass the filter. those fans arent meant to pull air through a "load". they are simple exhaust fans for low resistance applications. air is always going to take the path of least resistance, which might be the area around the blades instead of through the filter.