YIMATEECO Dust Filter PC 240mm for Computer Cooler Fan/PSU/Routers Nylon 80 Mesh, Magnetic Frame PC Fan Dust Mesh PC Cooler Filter Dustproof Computer Fan Grills (Nylon, 120x240mm, 2pcs, White)

Not sure what the actual airflow is, but my pc is still running at more or less the same temps. Filters trap dust and microfibers pretty well. The frame is flimsy and the magnets aren't strong though; if you accidentally warp the frame, it can be a pain to straighten out.

useful, good qualitynice one! Perfect size for OCD (finally refitted as expected).compare with other manufacturers, nylon is indeed much stronger in density, and the dustproof effect should be goodthere are cat hairs all over the house, I hope I can help to resist.the magnetic installation is very convenient, and I will repurchase it in the future. I plan to use it in my home NAS (Synology), PSP and other electronic products with heat dissipation,finally I found that my ITX needs it more : - )

Funzionali

I installed these on some Static pressure Arctic fans, and you can literally feel the complete difference. my case is an open case, there is absolutely no airflow restriction. This stops the air completely.feel like it blocks 80% of the air instead of allowing 65% of the air as stated in the description. returning these as they do not allow enough air flow.good points are1. They were white and white is my build2. they look nice and feel nice.bad points1. no airflow with filter

I have a Fractal Design Meshify 2 Compact. It is great for airflow but the front fans are unfiltered. Two of these covered my front fans and have made my case dust free. They are held in place with magnets so make sure your case has metal which they can attach to.Top Tip: Ensure you PC case has POSITIVE AIR PRESSURE. You want more filtered air going in than you have coming out. This will mean the air pressure inside the case is higher than ambient (air outside the case). Air will be forced out of any unfiltered gaps, cracks, mesh etc in the case and won't draw any unfiltered air in. To do this, ensure your intake fans are either designed to move more air than your exhaust fans or that they are running faster. You can check air pressure by using an incense stick. Smoke should be drawn in at the intake fans and smoke should be 'blown away' anywhere else... Thanks for attending my Ted Talk.