In some email I received from Thomas Michael Wanka, sie wrote:
> Hi,
> 
> On 1 Feb 2002 at 2:45, Rick Kelly wrote:
> > But I try to blow the dust out of my systems at least once a year.
> > 
> > Can't hurt. :-)
> 
> my IPC needed more than compressed air to get it clean. Since I put 
> it into my 19" rack it stays clean. I have to change the filter once 
> a month, but that is nothing compared to cleaning all the machines 
> inside.

Which filter are you changing? The one in the IPC or do you have a filter
on a fan into your rack which has a filter ?

Darren