lindab | we simplify construction Perforated diffuser HLD Technical data Sound power level The diagram for sound effect level and pressure applies to both horizontal and vertical dispersal. ǻ p t [Pa] HLD 200 150 250 315 400 500 630 100 70 50 30 20 15 10 7 100 150 200 400 500 700 300 1000 70 65 60 55 50 45 40 35 30 L WA dB(A) 400 500 700 1000 1500 2000 3000 1500 2000 3000 5000 7000 10000 q V [l/s] q V [m 3 /h] Size Centre frequency Hz Hz 63 125 250 500 1K 2K 4K 8K 250 K ok 4 -3 -3 1 -6 -16 -29 -37 315 K ok 12 1 0 1 -7 -16 -27 -36 400 K ok 5 -3 2 1 -8 -17 -29 -41 500 K ok 5 -3 2 1 -8 -17 -29 -41 630 K ok 5 -3 2 1 -8 -17 -29 -41 Throw l 0.2 / Turning point l 0.0 These diagrams apply for installation heights > 1 m. L ;M= (,$ ISOTERM L ;M= Q 6 ;LS= Q 6 ;M H= L ;M= (,$ ISOTERM l 0.0 [m] 10 8 7 6 5 4 HLD +5K 3 2 L ;M= Q 6 ;LS= Q 6 ;M H= 250 315 400 500 630 1 100 150 200 300 500 700 1000 l 0.0 [m] 10 8 7 6 5 4 HLD +10K 3 2 l 0.0 [m] 500 700 1000 2000 3000 q V [l/s] 1500 2000 3000 5000 q V [m 3 /h] 5000 7000 10000 15000 250 315 400 500 630 1 150 200 300 700 1000 500 700 1000 1500 2000 3000 2000 3000 5000 7000 10000 l 0.0 [m] q V [l/s] 5000 7000 20000 q V [m 3 /h] Lindab reserves the right to make changes without prior notice 3 2022-02-11
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