OHP, Heat

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I am a newbie and I am gonna go the OHP projector route.
I am either gonna buy a Dukane 4000 lumen OHP or the 3M 9800
6000 lumen projector. Do OHP put out a lot of heat? Would it
be too hot for a 12' x 12' room? Can you sit near it or is it too
hot? Also, is it worth an extra $100 for the 3M 9800? It puts out
2000 more lumen?
 
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