lindab | we simplify construction Plenum box Technical data Sound attenuation Δ L Sound attenuation Δ L of MBB-S / MBB-E / MBC / MBE + diffuser from duct to room, including end reflection, see example in table below. For other diffusers and plenum box variants, go to www. lindQST.com . Sound attenuation values for the chosen diffuser and plenum box variant can be found here. Example in Table below: PCA + MBB-S. MBB-S/-E Centre frequency Hz Ød 1 Ød 2 63 125 250 500 1K 2K 4K 8K 100 100 18 17 8 20 19 20 19 23 100 125 19 16 7 19 18 18 18 21 100 160 21 16 5 15 17 18 16 19 125 125 18 13 9 20 13 19 18 19 125 160 12 13 8 19 13 16 17 19 125 200 16 11 5 16 13 15 15 17 160 160 17 17 11 19 18 17 20 20 160 200 14 14 7 21 15 16 18 19 160 250 15 15 5 17 13 15 16 18 200 200 15 10 6 16 17 15 19 18 200 250 12 9 5 14 17 15 17 17 200 315 12 7 4 11 15 14 16 15 250 250 14 8 8 14 16 17 17 18 250 315 12 6 6 15 15 15 16 17 250 400 13 5 4 13 14 14 15 15 315 315 7 9 8 14 17 16 17 21 315 400 7 8 8 12 16 16 16 18 MB + Damper MB 2 Lindab reserves the right to make changes without prior notice 2020-09-21
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