I ordered a custom filter a couple of years ago and I still use it today! It filters dust really nicely, but you still have to vacuum or blast your computer with air once in a while as super-fine dust will still find it's way inside the computer. Unless you live in a clean-room, this cannot be avoided. Demci filters are the best I have ever used. Cleaning can be done with a brush or water, I would highly recommend NOT using a vacuum as I nearly ruined my filter that way. Airflow will be restricted somewhat just like any other dust filter, however if you make sure you have a high static pressure fan, it's not a problem at all.Oh and if you have a metal case, these filters are magnetic. No more screws! If you have a plastic case, you get an adhesive base with a magnet. It's super easy to clean. Highly recommended!
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