When it comes to cooling solutions, most people still use air for their PC's. Air is cheap (free most places), you can buy silent fans to avoid any overly noisy fans, and you won't spend a ton of money. You'll still have to deal with dust though. Filters can only help so much. We've all opened up a case an seen the results of what could've been a nuclear dust bunny. After some cleaning, it looks good as new and will stay that way, at least for a little while. But when looking closely at your fans, the innards are usually exposed by a small space around the core of the fan, allowing for dust and other airborne hoodlums to penetrate into your fan and accumulate somewhere that you can't clean off..



Link: Moditory