Terms of the Trade: What Is an Air Brick?

Air bricks, which are sometimes also referred to as air vents, are constructed to allow air to pass through them, as their name suggests. Holes in the brick, which are these days often made from iron or plastic, allow air to pass through in an effort to prevent moisture buildup and other problems when airflow isn't present. They are often seen at the ground level of walls and structures with suspended floors.