List of featured suppliers of AIR BRICK Cowls on Building Products Index
An air brick is a perforated brick that is used in construction to allow air flow. Its purpose is to prevent condensation and dampness in a building. Cowls are devices that are placed on top of chimneys to prevent rain and wind from entering the chimney. They also improve the airflow in the chimney, which can improve the efficiency of a fireplace or heating system.