An airbrick is a square or rectangular-shaped vent used in walls to allow air to circulate in and out of a building. There are several synonym options for airbrick, including ventilation brick, air vent, air duct, air grille, and wall vent. These synonyms are commonly used in the construction industry and are vital to maintaining adequate airflow within a building. The choice of synonym may depend on the context of the situation, with some terms more appropriate for specific types of ventilation systems and structures. Regardless of the term used, the primary objective remains to ensure that fresh air can circulate within a building, optimizing air quality and overall safety of its occupants.