The greater side will point down allowing air to slip through the wing.

Damage or motion enough to allow air into the turtle's body results in death.

The space between the arms allowed light and air from three sides.

It may be allowing cold air to leak in between the two windows.

The point is to allow air to circulate around the machine.

The ends of these tubes were left open to allow air to pass through.

They may be allowing cold outdoor air to enter between the windows.

A large vent on the side also allowed air out from the front wheel well.

The bags allow air, but in most cases no snow, to pass.

Rather, leave a window or door open a little to allow fresh air into the room.