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For horizontal one-way to four-way air discharge, for comfort zones, with fixed baffle element. Square ceiling diffusers. For more information see: https://www.trox.de/en/ceiling-diffusers/dlql-1e3d5f6d59a4fabf Ceiling diffusers with perforated square diffuser face. Supply air and extract air variants for comfort zones. Diffuser face with baffle element for horizontal one-way to four-way supply air discharge. For flush installation into all kinds of suspended grid or continuous plasterboard ceilings. Ready-to-install component which consists of the diffuser face with baffle element (only for supply air), and either a casing with top entry spigot or a plenum box with side entry spigot. Perforated diffuser face suitable for central screw fixing (variant -P). Spigot suitable for ducts to EN 1506 or EN 13180. Sound power level of the air-regenerated noise measured according to EN ISO 5135. This EPD includes the environmental data of the product series DLQL. The following represents a representative dataset of the most sold variant in the declared sales year (DLQL-T-Z-H-0-0-300-593-AK001-158-0).