I need to vent, bwah ha ha ha, for a minute. I hate our floor vents. Maybe not hate, but I have a very strong dislike for them.
I feel that it is harder to decorate and arrange furniture around them. It's probably just perception because wall vents claim the same amount of space on a wall, but they do make area rugs a challenge.
But here's why floor vents really suck: they aren't screwed in. They can be easily lifted out by any pair of curious, trouble making hands. Which means anything that will fit in the hole in the floor- 4"x12" -usually ends up down in the duct work.
We found quite a few missing items today, the photo above shows just what came out of one register!