Polystyrene plenum box Product description Pyramidal plenum box of expanded polystyrene (high thermal and acoustic capacity). Special for application with plate diffusers of 595x595 or larger and thickness 20 mm: 43-SF-Q, DFRO, DFRA, DFRQ, DFRE-Q, DFRE-GR-Q up to model 400, DAFC-Q, DAFT up to model 500, DFRT up to model 500, HDPR-Q, 50-FR-4 up to model 375 and 52-FR-4-STAMP up to model 525. It is ideal for mounting of swirl, diffusers Because these units are lightweight and have a trapezoidal shape, they are easily mounted in HVAC systems. Its dimensions and size make storage easy. Expanded polystyrene for isolation to UNE EN 13163. Class E1 fire-resistant material, with a density of 45 mg/m2 and grey colour. Transmission coefficient of 0.031 W/mk. Operation The components are supplied loose for on-site installation. Each plenum box has one or two connection kits according to material ordered: Plenum box kit that includes connection neck and piecework for bridge mounting Volume control damper kit. The mounting bridge is included in the side of the plenum itself. European pallet 50 units. General dimensions ØC = 160, 200 AND 250, ACCORDING TO DIFFUSOR MODEL Note: For more information refer to catalogue and/or Technical Department.