• cleaner air in the working environment.
• cleaner air going into the computer, which would prolong the life of the computer components inside.
• less maintenance on the computer, no need to open it up to clean the inside.
• less sick days used for workers due to a cleaner environment to work in.

Okay, some of the cons to such a device.

• extra cost for the systems themselves, so more cost up front.
• more power use, due to the increased resistance of the fans. This is sort of technical, but by putting a HEPA filter in place the fan would have to work harder to move the same amount of air
• may actually increase the noise of the fans, due to the extra restiction of the HEPA filter.
• HEPA filters would have to be replaced periodically.

So we do have both pros and cons to implementing this idea.  There are also some pluses that may be hard to quantify.  I think the people working in the office may actually feel better knowing that the air is getting filtered all the time.  I know in my current office there is a problem with mold.  At least there is a perception that we have a mold problem.  Some people get sick and blame it on the poor air quality of the office.  If we had little air purifiers running all the time, at each persons’ desk, we may have less complaints about the air quality.

This idea should be investigated further with some serious development.  If you want to pursue it, be my guest.  If you make a million bucks on it, give me 10%.  Thanks.