The DB210 / DB220 return perforated diffusers can be mounted in false ceilings or hanged from the ceiling with drop rods. The design of the perforated screen is completely similar to the DB200's one. Its sober and discreet design gives to DB210/220 series an excellent capacity of integration with modern ceiling constructions in the tertiary and hospital sectors. Size 600 can be mounted in false ceilings with tiles 600x600 mm. Diffusers with hinged removable core for the easy access to the installations above the ceiling with no need of tools, by means of PUSH fasteners.