lindab | we simplify construction Supply air nozzle DAD Technical data Capacity Volume flow q v [l/s] and [m 3 /h], total pressure Δ p t [Pa], throw l 0.3 [m] and sound power level L WA [dB(A)] can be seen in the diagrams. Throw l 0.3 Throw l 0.3 can be seen in the diagrams for isothermal air at a terminal velocity of 0.3 m/s. Resulting sound effect level The sound effect level from the nozzles must be added loga- rithmically to the sound effect level from the flow noise in the duct. See sample calculation, section Nozzle calculations. 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. Table Size 160 200 250 315 Centre frequency Hz 63 125 250 500 1K 2K 4K 8K 10 -1 -5 -5 -5 -8 -9 -10 11 1 1 -4 -4 -10 -16 -23 17 0 0 -4 -4 -13 -21 -29 16 1 -1 -2 -4 -13 -21 -32 Supply air l 0.3 [m] 40 30 DAD 20 15 160 200 250 315 10 7 5 4 3 2 1 5 20 10 15 20 30 30 40 50 60 80 100 40 50 60 150 200 80 100 300 l 0.3 [m] 150 200 500 700 q V [l/s] 300 q V [m 3 /h] 1000 ¨S T ;0A= $!$ , 7! D"! Q 6 ;LS= Q 6 ;M H= 2 Lindab reserves the right to make changes without prior notice 2020-12-17
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