Hi,
i've run a DLP projector in a "simulator" of sorts in my basement for some time now.
an insect _did_ crawl through an adjustment hole, and a huge (well-defined) leg was visible for a few weeks, but it eventually shifted out of the optical path.
basement dust is a bit different that 'upstairs' dust, and the DLP does not have a filter (like the HD LCD upstairs).
my basement is fairly "tight" to the elements, and the 'usual' amount of dust can be seen flying around in the light cone, nothing terrifying at all.
just keep the place clean.
one neat side note: i usually run the bulb on "economy". the basement seldom gets above 68 farenheit, so the air cooling the bulb is usually cool.
the manufacturer claims that this could extend the life of the bulb.
hope this helps,
Elden.
