Dust filter

[btph]

Recently built up a mini-itx. It has a single 120mm fan at the back, which i've reversed to make it an intake. It's the only intake fan on the system. Everything works fine, but I'm looking at adding a dust filter to it somehow. Just wondering what the best method would be. Presumably some filter on the outside would suit, so looking at the website come up with the following two options. Would one be any better than the other, or is there a better product entirely?

My basket at Overclockers UK:

• 1 x DEMCiflex Dust Filter 120mm, Round - Black/Black= £6.95
• 1 x DustEND G2 Dust Filter - Extra Durable & Adhesive - 1100mm= £17.99
• 1 x Raijintek Metis Plus Aluminium Mini-ITX Case - Green Window= £52.99

Total: £88.43 (includes shipping: £10.50)​

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[doyll]

DEMCiflex are good and come in many sizes and the magnetic mounting make them easy to remove and clean. Silverstone sell some but not as many sizes.

 

[varkanoid]

+1 for No.1

Also if I have an internal AIO that blows air out of the case through the rad I also put a filter on the push fan as you can never stop 100% dust and its useful to keep dust off the rad. Just have a magnetic one and I clean it every so often.