A Bottom Door Grille is a type of air grille specifically designed to be installed at the bottom part of doors or partition walls. It is used to provide airflow between two separate spaces while the door is closed. This grille is often utilized in residential, commercial, and even industrial buildings.
Bottom Door grilles operate based on pressure differences between adjacent spaces. Air always moves from a high-pressure area to a low-pressure area, and the grille enables this movement efficiently—ensuring balanced air pressure and preventing negative pressure or suffocation, especially in smaller or enclosed spaces.
These grilles typically comprise two frames that form an open passage for air transfer. The blades are usually angled between 30° to 45°, directing the airflow either upward or downward. The grille can be fabricated from various materials depending on the desired application.