We have test drove a few Odysseys and I'm confused: Is the heat supposed to come out of the ceiling vents in the 2nd and 3rd rows? How does this work?
Some dealers seem to think so, but I have yet to see it happen. A/C - yes, but heat??
So presumably if you turn the rear temperature dial to 'Heat' and turn up the rear fan, it will blow more hot air through the floor vents in the second and third row (are there floor vents in the second and third row?)...
Floor vents for the second row are under the driver and passenger seat so make sure that you don't stick anything under there and that thay are not blocked by the carpeting.
The vents for the third row are near the floor on the right side of the vehicle and blow across to the drivers side.
If the unit goes under the front of the seat facing forward, it's OK. I would not put in a unit at the back facing rearward (although I've seen it done that way) as that's the "footspace" and the unit will definately get kicked.