Grilles
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Product overview / symbols 3 Ceiling diffusers - visible 6 Displacement diffusers Constant- / variable flow dampers Fresh air valves/overflow units 16 Cleanroom diffusers © 10.2011 Lindab Ventilation A/S. All forms of copying without written permission are forbidden. BaiTi'si* js Lindab AB's registered trademark. Lindabs products, systems and product group and product designations are protected by intellectual property rights (IPR).

Grilles Product Right to alterations reserved

Great flexibility Supply and exhaust through ventilation grilles is traditionally used in all types of buildings. Supply is usually placed in the wall near the ceiling, or in the floor in long facades. Exhaust is usually placed in the ceiling or in the wall near the ceiling. In the Lindab programme of ventilation grilles, there are grilles for any purpose. We produce grilles in both aluminium and steel. Supply air near the floor or in the window-sills is typically used along facades in order to reduce drop in temperature or heating due to the sun, and often in a combination with ceiling...

Right to alterations reserved

Circular duct grille RGS is a rectangular ventilation grille with vertical adjustable bars for direct installation in circular ducts. The grille can be used for both supply and exhaust air. The grille can be supplied with horizontal directional bars, straight or slanting sliding damper or blade damper. The grille is designed so that the grille flanges always fit tight to the duct regardless of the duct diameter. RGS is made of hot-galvanised steel plate and is put together without welding. This means that the grille can be used without further surface treatment. The exterior of the grille...

Circular duct grille Accessories RGS-1, With directional bars. RGS-2, With blade damper. RGS-3, With directional bars and blade damper. RGS-4, With straight sliding damper. RGS-3 As RGS-2 with horizontal directional bars specifically for supply air. RGS-4 The grille is suitable for exhaust only. RGS-6 Slanting sliding damper Suitable for supply and exhaust air. The grille is equipped with a slanting sliding damper, which means the air is distributed evenly over the whole grille. RGS-6, With slanting sliding damper. RGS-2 Suitable for supply and exhaust air. The grille is equipped with a...

Circular duct grille Technical data The diagram for throw (see next page) specifies effective speed v0 [m/s] as a function of the volume flow q [m3/h, l/s] for each grille size with 0o bar setting. The diagram for throw (see next page) specifies the throw l0.2 [m] at an average terminal velocity of 0.2 m/s, 0o bar setting without ceiling effect. (Distance from grille to ceiling greater than 800 mm.) Table 1: Correction for dispersal: Correction factor V0 Correction factor l0,2 Ceiling effect If the distance from grille to ceiling is less than 300 mm, the throw l0.2 must be multiplied by...

Circular duct grille Technical data - Supply air The speed in occupied zone vX: Throw according to the diagram on the next page: Terminal velocity vX at distance X: The speed in the occupied zone: Other terminal velocities vX: The distance to the point where the speed has decreased to vX is: The speed 4 m from the grille is: X = K x l0.2 The distance to the point where the speed has decreased to 0,3 m/s is: 0,67 x l0,2 = 0,67 x 9 = 6,0 m We reserve the right to make changes without prior notice

Circular duct grille Technical data - Supply and exhaust air Effective speed v0 - Throw l0.2 v0 [m/s] Sample calculation 3 Grille 1025 x 75 Volume flow: With 90o dispersal: (See table 1, previous page) v0 = 1.2 x 2.7 = 3.2 m/s 15 16 17 18 We reserve the right to make changes without prior notice

Circular duct grille Technical data- - Supply and exhaust air Pressure - Sound level Volume flow: Duct speed: The following pages contain dimensioning tables for RGS with accessories 4, 6 and 7. Correction for RGS with accessories 2 and 3 - see table 5. Correction for RGS with accessories 2 and 3. Table 5: Table 6: Correction for free area.: F [m2] correction [dB] Correction free area 1. Volume of air (m3/h) 2. Throw 3. Duct speed 4. 100% open damper 5. 50% open damper 6. Volume of air (l/s) 7. Pressure loss 8. Sound level 9. Pressure loss 10. Sound level Sound power level LWA Explanation...

Circular duct grille Technical data-Supply and exhaust air Dimensioning table with accessories 4, 6 and 7 B dimension: 75 mm We reserve the right to make changes without prior notice

Circular duct grille Technical data- Supply and exhaust air Dimensioning table with accessories 4, 6 and 7 B dimension: 125 mm We reserve the right to make changes without prior notice

Circular duct grille Technical data- Supply and exhaust air Dimensioning table with accessories 4, 6 and 7 B dimension: 150 mm We reserve the right to make changes without prior notice

Circular duct grille Technical data-Supply and exhaust air Dimensioning table with accessories 4, 6 og 7 B dimension: 225 mm We reserve the right to make changes without prior notice

Ventilation grille B3020 is a rectangular aluminium grille with fixed horizontal bars. B3020 is used for both supply and exhaust air, and is supplied as standard with springs for installation in plenum boxes type VBA, WB or mounting frame type GGR. B3020 can also be used with volume regulator GAT. The grille should be removed to gain access to the plenum box or duct. The external parts should be wiped with a damp cloth. Other sizes and types can be supplied - see special grille B. Accessories Plenum box: Mounting frame: Volume regulator: Order code Product Type A - measure B - measure...

Special grille With 25 mm flange - wall/ceiling With flange - floor B+40/A+40 B+20/A+20 Materials and finish Grille: Standard finish: Aluminium Natural anodized On request: RAL 9010 Gloss 30 With Z frame - wall With Z frame - floor B+17/A+17 25 25 The grille is available in other colours. Please contact Lindab’s sales department for further information. With angle frame - wall With angle frame - floor B+17/A+17 25 Product B a b c Type Frame Grid Installation Accessories A - Measure B - Measure A x B: Duct/cutout A dimension: along the bars B dimension: across the bars Can be supplied in...