All the inputs and connectors are located on the back of the projector, and are discussed below.
To Filter, or Not To Filter: That seems to be the question: Interestingly, the H6500 manual says it has a pair of dust filters - one on each side. This is very unusual for a DLP projector, as the light path is mostly sealed, so dust really doesn't get inside. On the other hand, if you've ever seen the accumulation of dust inside a desktop computer after a couple of years (ugly), all that dust can't be good for heat buildup. As these filters only call for cleaning - not replacing, every 1000 hours, I like that this Acer has them. And, should you be mounting this projector, the good news is no problem changing the filters while mounted!
Here's the issue. Now that I've discussed the potential advantage of having one, the only problem is I'm staring at this H6500 projector and I cannot find any filter door or for that matter any side filters. I can see through the grates they show, but I see no filter, nor access. I'm not concerned. My best guess is that some business version of the H6500 does have the filters and a slightly different case, or one may have to remove one half of the top of the projector, which you have to do to change out the lamp.