How to make dust filters for your PC case

Stop your PC getting clogged with dust by fitting a super-cheap custom filter, whether it's made from metal mesh or a simple pair of tights.

Applying hot glue to a PC case fan

Many PC cases come with dust filters these days, but they often only cater for obvious areas, such as the PSU and front intake fans. There may be additional fan mounts in your case that lack filters, letting dust into the interior. In this guide, we look at super-cheap ways to add a custom dust filter to your PC case.

At Custom PC, we’ve been modding PC cases since 2003, giving us loads of experience in the art of customizing your case. We know exactly what tools you need and which methods work best.

There are, of course, plenty of third-party dust filter options available, allowing you to fit various sizes of filters to your case. However, it’s also possible to make your own filters that are tailor-made to your dimensions, and they can even be attached magnetically.

Types of PC case dust filters

Ready made PC case dust filters

Ready-made dust filters

There’s already a variety of dust filters available that you can buy and fit to your case and fans. They include kits made for specific cases, or filters simply designed to slot inside unused fan mounts or underneath your case.

Mesh PC case dust filtersMesh screw-in filters

These filters usually come in single fan sizes, such as 120mm or 140mm, and mount directly to fans and radiators using standard fan screws. They’re useful for aluminum cases that won’t work with magnetic dust filters, but they’re tricky to remove.

Magnetic PC case dust filterMagnetic filters

Magnetic filters are sold individually in a variety of sizes, or as complete packs for specific cases. They simply adhere to the surface of steel cases, covering up fan holes or vents and trapping dust, while still allowing air into the case.

Make a magnetic dust filter for a PC case

Make a magnetic PC case dust filter

1. Get materials

You may want a more elaborate design than a simple fan filter, while other filters might not quite fit over your intended vent hole. If you want to make a custom filter, you can use magnetic tape and PC case mesh sheet.

Cutting a magnetic PC case dust filter with scissors

2. Cut mesh to size

The mesh is available in large sheet form and is relatively cheap. Start by measuring the size of the hole you need to cover. Mark up the mesh, then use a sturdy pair of scissors to cut it to size.

Attacingh magnetic strip to a custom PC case dust filter

3. Cut magnetic strip to size

The magnetic strip comes in a variety of lengths and widths. We’ve used 10mm-wide adhesive strip, as this width sticks well to the mesh.

Custom magentic PC case dust filter

4. Apply to mesh

Press the strip firmly onto the mesh. If yours doesn’t stick securely for whatever reason, you can use a small amount of epoxy or glue from a glue gun to secure it onto the top side.

Make a PC case dust filter from a pair of tights

Fan and a hot glue gun

1. Make your own fan filters

If you want a cheap and effective way to battle dust, you can create your own filters using common household materials. You’ll need thin tights or stockings, washers and some glue. We’ll be making filters for fans, but you can secure filter material to anywhere in your case using a glue gun.

Cutting tights to size to make a PC case dust filter

2. Cut tights to size

You’ll want the material to be large enough to stretch taut over the fan intake, and to be glued at the sides. The mesh size is already small enough to catch dust, so stretching it will serve to boost airflow.

Applying hot glue to a PC case fan

3. Apple glue to fan frame

Glue one edge of the material to the rear of the fan frame, using a thin bead to secure the material. Press the material in place and allow the glue a few moments to dry.

Stretching tights over a case fan

4. Stretch material over fan frame

With one edge secured, stretch the material over the opposite edge. You need to pull with reasonable force, but not so much that the glue can’t hold. After that, go ahead and do the same for the remaining two edges.

Securing tights to a PC case fan to make a dust filter

5. Punch fan holes

The material can fray if you screw into it haphazardly, so we recommend punching some clean mounting holes into it with a leather hole punch. This will cut neatly and ensure your filters are durable.

PC fan dust filter made from a pair of tights

6. Use washers

To stop the fan screws twisting the mesh, use washers over the material to separate them. This will allow you to tighten the screws without damaging the filter. Glue the washers in place to make mounting the fan easier.

PC case fan with a custom dust filter made from tights

7. Screw fans to case

Finally, mount the fan into the case or radiator using washers and fan screws. The fan will now have complete dust protection, shielding your PC’s innards. To clean it, just go over it with a vacuum cleaner when necessary.

With your new custom dust filter attached to your case, you now just need to enjoy using a cool-running PC with an interior that doesn’t get overly clogged with dust. Who would have thought an old pair of tights would be so useful for PC building? For more PC customization ideas, check out our guide to painting your PC case. If you’re planning a new build, then you’ll also want to read our full guide on how to build a gaming PC, which covers every step of the process.