DrewE wrote:
I know you don't really like the idea (for reasons that I cannot fathom), but I would heartily recommend the vent cover as well. I have them on nearly all my ceiling vents--the exception being one that is immediately next to the air conditioner where many vent covers would adversely affect the air flow through the AC--and I would not want to be without them. Being able to have the vents open without fear in adverse weather conditions and when driving down the road are tremendous advantages.
X2, not sure why the OP doesn't want a vent cover? I see them as one of the best things since sliced bread.