Originally Posted by
nkedel
Potential problems:
* noise/heat when running
* cost of lamp replacements
* minimum focus distance (as that's not a short throw, although it may be short enough)
None of those are definite problems with that model or your use, but they're issues to look into. If the last turns out to be an issue, take a look at models specifically designated as "short throw" which are intended for use in a small space and relatively close to the projection screen (they're often quieter/cooler for use in small conference rooms, as well.)
1.18 is pretty short, but no matter since the OP chose a 4:3 screen. by the time he's sized (being letterboxed), it'll be like shooting with a .8
And don't worry about the noise/heat issue. Just don't sit next to the vent, which will be expelling very hot air no matter what project or you have.