Wide angle lens for projector?
Found a reference to Panasonic PT-D5700E on a Russian Interactive Projection (Living Surface) page. They have some information on there about how the system works.
Looking at the Projector Central page (link above) we found a feature allowing us to change lens. So it appears some of these projectors have wide angle lenses available. Maybe that's why the distance from projector to floor is so low for some of these setups.