A vent for an exterior brick wall. The vent includes a first enclosure which is installed in the brick wall in place of an entire brick. The enclosure defines a flow path from ambient conditions to the air in between the brick wall and an interior wall. The vent includes a shield for protecting the flow path of the enclosure from being obstructed by falling debris. Some embodiments includes a vertical section of vents which is also protected from falling debris such as trash mortar.