Who has metal air vents for their TH while driving?

Hondavalk wrote:
If there like the ones in horse trailers they are very effective. On them the center position is closed and you can raise them up to face in either forward or backwards.

Same here. We have that type over every horse "stall" in every trailer. They are a PITA to reach and deploy when they are 7'9" high. They are extremely tight and sturdy - never a worry that they will flop around and bust off.