Diffusers and grilles are used to provide a covering to ventilation terminals. They are typically found where air conditioning or extraction systems are installed such as in hotels, offices, schools and other public buildings.

Displacement units can direct supply air in the desired direction and include fixed blade, louvred, bar and deflection diffusers.

An air valve is an adjustable diffuser that can be opened and closed on demand.

Different types of grille are available for exhaust air, return air and transfer air.

Decorative grilles are used where appearance is important, and can be specified in finishes such as polished brass, chrome or nickel. They typically have a perforated, mesh or linear slot format.