I have a small, tabletop air purifier in my apartment. I find that it helps cut down on my allergies and reduces the amount of dust around. The machine pulls air in through the front into its filter, and then blows it out the side. Now, I've lost a computer or two to dust in the past. The heat sink fan on top of the processor got clogged and failed, and it overheated so much that it started shutting down spontaneously. So, what would happen if I put a computer and an air purifier together? Not literally, mind you. If I take, let's say an iMac, and then put the air purifier next to it so that the clean air output blows across the vents in the back of the computer, would this produce a tangible benefit?