I have a 4X10 air conditioning vent in my dining room ceiling. It's adjacent to an outside wall, about a foot from a corner.

I want to replace it with one that has a lever to allow me to close it.

There are several types of registers- the one currently there has the slats all in one direction and it's directing the air flow towards the wall.

Was this installed incorrectly?

And- am I better off getting one that vents to the side along the wall, or out into the room? (I assume it would make no sense to get one that vents along the wall to both sides)