lindab | we simplify construction Vissible diffuser Technical data Capacity Volume flow q v [l/s] and [m 3 /h], total pressure Δ p t [Pa], throw l 0.2 [m] and sound power level L WA [dB(A)] can be seen in the diagrams. Frequency-related sound effect level The sound effect level in the frequency band is defined as L WA + K ok K ok values are given in charts beneath the diagrams on the following pages. Quick selection Supply air duct Ød 1 125 160 200 Δ p t ≥ 50 Pa 30 dB(A) l/s m 3 /h 55 198 76 274 129 463 Δ p t ≥ 50 Pa 35 dB(A) l/s m 3 /h 71 256 99 356 154 553 LCF Throw l 0.2 The throw is specified at a terminal velocity of 0.2 m/s. l 0.2 [m] LCF 10 7 6 5 4 3 2 125 160 200 1 15 20 30 60 80 100 40 50 60 150 200 80 100 300 l 0.2 [m] 150 200 500 700 q [l/s] 300 v 1000 q v [m 3 /h] Sound attenuation Sound attenuation of the diffusers Δ L from duct to room, including end reflection, see table below. Size 125 160 200 Centre frequency Hz 63 125 250 500 1K 2K 4K 8K 16 9 12 8 10 11 16 21 13 9 11 6 9 8 15 20 13 13 14 15 17 17 22 25 Balancing Balancing data is contained in a separate brochure. 2 Lindab reserves the right to make changes without prior notice 2020-12-16
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