Polyaire Model OBD Opposed Blade Dampers are commonly used as a volume control device in supply, return and exhaust air systems.

Polyaire Model DG-FC Door Relief Grilles are designed for use indoors where constant air transfer is required along with non-vision (sight proof).

Polyaire Model DG-FC Door Relief Grilles are designed for use indoors where constant air transfer is required along with non-vision (sight proof).

Polyaire Model DG-FC Door Relief Grilles are designed for use indoors where constant air transfer is required along with non-vision (sight proof).

Polyaire Model DG-FC Door Relief Grilles are designed for use indoors where constant air transfer is required along with non-vision (sight proof).

Polyaire Model DG-FC Door Relief Grilles are designed for use indoors where constant air transfer is required along with non-vision (sight proof).

Polyaire Model DG-FC Door Relief Grilles are designed for use indoors where constant air transfer is required along with non-vision (sight proof).

Polyaire Model DG-FC Door Relief Grilles are designed for use indoors where constant air transfer is required along with non-vision (sight proof).

Polyaire's Sqaure Outside Air Louvres (OAL-S) are designed to provide weather protection of outside air or discharge openings to allow free passage of air. These external louvres may also be used for natural ventilation.