Aluminium AC Grill / Air Diffusers

A diffuser is "a device for reducing the velocity and increasing the static pressure of a fluid passing through a system”.[1] Diffusers are used to slow the fluid's velocity while increasing its static pressure. The fluid's static pressure rise as it passes though a duct is commonly referred to as pressure recovery. In contrast, a nozzle is often intended to increase the discharge velocity and lower pressure while directing the flow in one particular direction.