I have a lab with PC 's with Fedora installed on them.
There is so much dust in this Lab. Tried cleaning (blowing) the PC's each second week.

Is there a way I can protect this computers from dust?

Thanks

.....

Are you suggesting that Fedora is causing the dust? (had to say it!)

I have found that mounting the fans in such a way, that they blow, rather than suck keeps the insides of my desktop case fairly clean.

My rack is in a separate room, not much bigger than the rack itself, which is relatively air tight, I have two bathroom style exhaust fans in the room, with some fly wire screen, and a few dish cloths cut to size as filters, but every month or so, I still give my server cases a blow with the compressor (be careful with this as compressors tend to build up condensation and water + servers != good)

Airfilters.

Most computer labs I've seen have air-con, and most air conditioners have airfilters. Check, and clean/repalce the air filters in the air-con.

That will only slightly cut down the amount of dust in the lab though, humans always drop dead skin/hair particles, etc. (gross, eh?) and that is what a lot of dust in computers is made of- bits of shed human.

So to cut down on dust in the case, air filters...again. You can get aftermarket airfilters that will screw onto the case fans, or you can make them yourself. It makes a big difference- the case I am currently using (an antec solo) has intergrated air filters, and the amount of dust buildup that case gets in 9-12 months is less than unfiltered cases I've used in the past get in 1-3 months...

It also helps to seal all the cracks, joins in the case. Air (and dust) will 'leak' into the case from cracks.

If the fan cant 'suck', it cant 'blow'. I would guess you mean that you setup all your fans so they blow out? That doesnt really help either, the dust will come in the cracks in the case etc..

Best solution: clean the lab.

Anything else is just delaying the inevitable.

Well, this is why professional equipment is designed to work at a positive pressure; the cracks leak air out and not in. This only really helps if the fans are fitted behind air filters, and those filters are reasonably well sealed to the fans, but it can certainly help. The trouble is that you lose a lot of flow by fitting filters, if they are effective at filtering.

This is of course if you really need to exchange air with the outside world; with lower dissipation, and nice conductive cases you may be able to get away with stirring the air internally and not exchanging air with the outside world. For high dissipations, this will produce too high a temperature rise, and so won't be a possibility.