Thermaltake Magnetic Fan Filter Cooling AC-004-ON1NAN-A1 Black

The Thermaltake AC-004-ON1NAN-A1 is a black magnetic fan filter with a fine mesh for dust reduction, suited to PC builders who want to add a filter to a compatible case opening.

Recommended For

• PC builders adding a removable dust filter to an uncovered 120 mm or 140 mm intake opening; Thermaltake says Matrix Duo includes both sizes and attaches magnetically to compatible metal surfaces.
• PC owners whose build uses both 120 mm and 140 mm fan openings and who want one filter set to cover either size, after checking that the openings and mounting surfaces match.
• Builders looking to reduce dust entering through a compatible PSU air intake or other intake vent; Thermaltake specifically identifies PSU intake as a use for its filters.
• DIY PC builders who want a filter they can remove for cleaning or repositioning rather than a permanently fixed mesh; community discussions describe magnetic filters as a practical retrofit for uncovered fan openings.

Real-World Use Scenarios

• When a PC case has an unfiltered 120 mm or 140 mm intake opening, users can place the matching magnetic filter over the vent to help reduce dust entering the case; it won’t make the system dust-free, so periodic cleaning is still needed.
• For a build with both 120 mm and 140 mm filtered openings, the two-size set lets users cover one opening of each size without buying two separate filter sizes, provided the case has a suitable mounting surface.
• When a user wants to clean a case intake area, the magnetic filter can be lifted off and reattached without unscrewing the fan, making access easier for routine dust removal.
• For a power-supply intake grille that matches one of the filter sizes, users can add a removable dust barrier; check that the grille is sized appropriately and that the filter can sit securely over it.
• When the case is in a dusty environment, users can add filtration at a compatible intake and clean the mesh as dust builds up; a dust-loaded filter may restrict airflow, so it should not be treated as maintenance-free.