A comprehensive range of ceiling mounted perforated face diffusers is available, including the redesigned Model PD, Model DFP drop face perforated diffuser and a new design Model DPP drop plaque perforated face diffuser. Each diffuser produces a radial air pattern and even air distribution. A collection of popular frame styles allows integration with most modular ceiling systems. All outer frames are manufactured from high quality extruded aluminium sections and feature a welded construction.