Profile: Trox UK Ltd. specializes in manufacturing HVAC. Our products include grilles & diffusers, air-water systems, volume flow control devices, filtration, ventilation systems, control dampers & louvres, attenuators and IT cooling systems. Type ADLQL ceiling diffusers are ideal for flush installation in tiled ceilings. They are recommended for room heights of between 2.60m and 4.00m. The DS rectangular cased attenuator features include aerodynamic splitters & side liners, slide-on flanges and erosion protected acoustic infill covered by galvanised perforated sheet metal.