lindab | we simplify construction Perforated diffuser HLD 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. Throw l 0.2 / turning point l 0.0 Throw l 0.2 [m] can be seen in the diagrams for isothermal air at a speed of 0.2 m/s. Turning point l 0.0 [m] can be seen in the diagrams for heated air, +5 K +10 K respectively. Frequency-related sound effect level The sound effect level in the frequency band is defined as L WA +K ok . K ok values are specified in charts beneath the dia- grams on the following pages. Quick selection Size 250 250 315 315 400 400 500 500 630 630 Size 250 250 315 315 400 400 500 500 630 630 Size 250 250 315 315 400 400 500 500 630 630 Horizontal Vertical Horizontal Vertical Horizontal Vertical Horizontal Vertical Horizontal Vertical Horizontal Vertical Horizontal Vertical Horizontal Vertical Horizontal Vertical Horizontal Vertical Horizontal Vertical Horizontal Vertical Horizontal Vertical Horizontal Vertical Horizontal Vertical l 0.2 l 0.0 q v q v P t isoterm -5K [l/s] [m 3 /h] [Pa] [m] [m] L WA = 50 259 934 44 2 259 934 44 3 394 1420 37 2 394 1420 32 3 586 2111 32 2 586 2111 32 2 938 3377 32 3 938 3377 32 2 1500 5401 32 4 1500 5401 32 2 L WA = 55 305 1099 62 2 305 1099 62 3 457 1647 50 2 457 1647 50 3 680 2447 44 3 680 2447 44 3 1087 3915 42 3 1087 3915 42 3 1739 6262 42 4 1739 6262 42 2 L WA = 60 359 1294 85 2 359 1294 85 4 531 1910 68 3 531 1910 68 3 788 2838 58 3 788 2838 58 3 1261 4539 57 4 1261 4539 57 3 2017 7260 57 5 2017 7260 57 3 Supply air With its special design, HLD is suitable for the supply of large volumes of air with short throws in a limited area. This concentrates the supplied air in a small area within a larger space, after which the air distributes itself around the premis- es. Normally, a horizontal dispersal pattern is recommended in cooling situations and a vertical dispersal pattern in heat- ing situations. Planning HLD with cooled air works in much the same way as dis- placement ventilation. Displacement ventilation has a higher temperature efficiency than mixing ventilation, and thus more power is discharged with the same volume of air and the same cooling temperature. For the calculation of discharged power in a cooling situation, use the calculation method for displacement ventilation. For HLD with heated air, power is calculated as for mixing ventilation. Horizontal supply air - cooling Vertical supply air - heating 2 Lindab reserves the right to make changes without prior notice 2022-02-11
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