Square swirl ceiling diffusers with fixed blades
- VWR-N, 315 + RER-LB 315 + CRC 250
Explanation
VWR-N = Diffuser type
315 = Diffuser size (Ø diffuser neck connection)
Accessories
RER-LB = Plenum box
CRC = Regulating valve for plenum box
250 = Plenum box connection diameter
Dimensions
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| 125 | 171x171 | 123 | 125 | | 160 | 213x213 | 158 | 160 | | 200 | 264x264 | 198 | 200 | | 250 | 326x326 | 248 | 250 | | 315 | 405x405 | 313 | 315 | | 355 | 455x455 | 353 | 355 | | 400 | 510x510 | 398 | 400 | | 500 | 594x594 | 498 | 500 |
Selection
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| 40 | Lth | 0.40 | | | | | | | | | Ps | 7 | | | | | | | | | Veff | 1.10 | | | | | | | | | Lw | <20 | | | | | | | | | 60 | Lth | 0.60 | 0.50 | | | | | | | | Ps | 16 | 7 | | | | | | | | Veff | 1.70 | 1.40 | | | | | | | | Lw | 22 | <20 | | | | | | | | 80 | Lth | 0.80 | 0.70 | | | | | | | | Ps | 29 | 12 | | | | | | | | Veff | 2.20 | 1.80 | | | | | | | | Lw | 30 | 21 | | | | | | | | 100 | Lth | 1 | 0.9 | 0.80 | | | | | | | Ps | 45 | 18 | 6 | | | | | | | Veff | 2.80 | 2.30 | 1.60 | | | | | | | Lw | 36 | 27 | <20 | | | | | | | 120 | Lth | 1.20 | 1.10 | 0.90 | | | | | | | Ps | 64 | 26 | 9 | | | | | | | Veff | 3.40 | 2.70 | 1.90 | | | | | | | Lw | 41 | 33 | <20 | | | | | | | 150 | Lth | 1.50 | 1.80 | 1.10 | 1 | | | | | | Ps | 101 | 73 | 14 | 5 | | | | | | Veff | 4.20 | 4.55 | 2.40 | 1.80 | | | | | | Lw | 47 | 47 | 25 | <20 | | | | | | 200 | Lth | 2 | 2.30 | 1.50 | 1.30 | | | | | | Ps | 179 | 113 | 24 | 9 | | | | | | Veff | 5.60 | 5.60 | 3.20 | 2.50 | | | | | | Lw | 55 | 53 | 33 | 23 | | | | | | 250 | Lth | | | 1.90 | 1.70 | 1.40 | | | | | Ps | | | 38 | 14 | 4 | | | | | Veff | | | 3.90 | 3.10 | 2.10 | | | | | Lw | | | 39 | 30 | <20 | | | | | 300 | Lth | | | 2.30 | 2 | 1.70 | 1.80 | | | | Ps | | | 55 | 20 | 6 | 4 | | | | Veff | | | 4.70 | 3.70 | 2.50 | 2.30 | | | | Lw | | | 44 | 35 | <20 | <20 | | | | 400 | Lth | | | 3 | 2.70 | 2.20 | 2.40 | | | | Ps | | | 98 | 36 | 11 | 8 | | | | Veff | | | 6.30 | 4.90 | 3.40 | 3.10 | | | | Lw | | | 52 | 43 | 28 | 25 | | | | 500 | Lth | | | | 3.30 | 2.80 | 3 | 2.50 | | | Ps | | | | 56 | 18 | 12 | 6 | | | Veff | | | | 6.10 | 4.20 | 3.90 | 2.80 | | | Lw | | | | 49 | 34 | 31 | <20 | | | 600 | Lth | | | | 4 | 3.30 | 3.60 | 3 | | | Ps | | | | 80 | 26 | 18 | 9 | | | Veff | | | | 7.40 | 5.10 | 4.60 | 3.30 | | | Lw | | | | 54 | 39 | 35 | 23 | | | 700 | Lth | | | | | 3.90 | 4.20 | 3.50 | 2.70 | | Ps | | | | | 35 | 24 | 13 | 8 | | Veff | | | | | 5.90 | 5.40 | 3.90 | 3.10 | | Lw | | | | | 44 | 40 | 28 | <20 | | 850 | Lth | | | | | 4.70 | 5 | 4.30 | 3.30 | | Ps | | | | | 52 | 36 | 19 | 12 | | Veff | | | | | 7.20 | 6.60 | 4.70 | 3.80 | | Lw | | | | | 49 | 46 | 33 | 25 | 1000 | Lth | | | | | 5.50 | 5.90 | 5 | 3.90 | | Ps | | | | | 72 | 50 | 26 | 17 | | Veff | | | | | 8.40 | 7.70 | 5.60 | 4.50 | | Lw | | | | | 54 | 50 | 38 | 29 | 1200 | Lth | | | | | | | 6 | 4.70 | | Ps | | | | | | | 37 | 24 | | Veff | | | | | | | 6.70 | 5.40 | | Lw | | | | | | | 43 | 34 |
Symbols and specifications
- Q = Air volume in m³/h
- Ak = Effective surface (free area) in m²
- B = Distance between the diffusers in m
- H = Installation height of the diffusers in m
- Vz = Maximum velocity at the occupied zone according to distance between the diffusers and installation height in m/s
- Vk = Average effective velocity through the diffuser in m/s
- X0.25 = Throw length in m at an end velocity Vt of 0,25m/s
- Ps = Static pressure loss given in Pa
- Lw(A) = Acoustic power in dB(A)
- The throw X0.25 is given at an end velocity of 0.25m/s for a smooth ceiling without any obstacles.
- The values are given for isothermal supply air. Throw distances for cooling conditions at -11K can be calculated by dividing the X0.25 values with factor 1.1. For heating purposes at Dt of +11K a multiplier of 1.1 should be applied to the given X0.25 value.
- In order to achieve a high comfort level, selections can be made according to the maximal velocity at the occupied zone Vz. These values are given at distances between diffusers B and installation heights H. Velocities Vz lower than, or equal to 0,25m/s at the occupied zone are advised.
- The pressure losses Ps are given for diffusers without damper of with fully opened damper.
- The acoustic power values Lw(A) are given for diffusers without damper of with fully opened damper without room attenuation. Acoustic powers below 20dB(A) are mentioned as "<20" in the tables.
- For all special requirements, please contact our engineering office.
Placement instruction
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