Circular ceiling diffuser with fixed diffusion rings
Explanation
PRC+RC = Diffuser type
200 = Diffuser size (Ø diffuser neck connection)
Dimensions
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150
| 250 | 159 | 210 | 200
| 300 | 199 | 260 | 250
| 342 | 249 | 300 | 315
| 398 | 314 | 350 |
Quick selection
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| Q | Ak | 0.009 | 0.014 | 0.02 | 0.028 | | 100 | Vk | 3.2 | | | | | X0,25 | 0.7 | | | | | Ps | 4 | | | | | Lw(A) | <20 | | | | | 150 | Vk | 4.8 | 3 | | | | X0,25 | 1.1 | 0.9 | | | | Ps | 9 | 4 | | | | Lw(A) | <20 | <20 | | | | 200 | Vk | 6.4 | 4 | 2.8 | | | X0,25 | 1.5 | 1.2 | 1 | | | Ps | 16 | 6 | 3 | | | Lw(A) | 29 | <20 | <20 | | | 300 | Vk | 9.6 | 6 | 4.1 | 3 | | X0,25 | 2.2 | 1.8 | 1.5 | 1.3 | | Ps | 37 | 15 | 7 | 4 | | Lw(A) | 43 | 29 | <20 | <20 | | 400 | Vk | 12.8 | 8 | 5.5 | 4 | | X0,25 | 3 | 2.4 | 2 | 1.7 | | Ps | 65 | 26 | 12 | 6 | | Lw(A) | 53 | 39 | 27 | | | 500 | Vk | | 10 | 6.9 | 5 | | X0,25 | | 3 | 2.4 | 2.1 | | Ps | | 40 | 19 | 10 | | Lw(A) | | 47 | 35 | 25 | | 600 | Vk | | | 8.3 | 6 | | X0,25 | | | 2.9 | 2.5 | | Ps | | | 27 | 14 | | Lw(A) | | | 41 | 32 | | 700 | Vk | | | 9.6 | 7 | | X0,25 | | | 3.4 | 2.9 | | Ps | | | 37 | 20 | | Lw(A) | | | 47 | 37 | | 800 | Vk | | | | 8 | | X0,25 | | | | 3.3 | | Ps | | | | 26 | | Lw(A) | | | | 42 | | 900 | Vk | | | | 9 | | X0,25 | | | | 3.8 | | Ps | | | | 33 | | Lw(A) | | | | 46 | | 1000 | Vk | | | | | | X0,25 | | | | | | Ps | | | | | | Lw(A) | | | | |
Symbols and specifications
- Q = Air Volume in m³/h
- Ak = Effective surface (free area) in m²
- Vk = Average effective velocity through the grill in m/s
- X0.25 = Throw length in m at an endvelocity 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 deviding 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 grilles without damper of with fully opened damper.
- The acoustic power Lw(A) are given for grilles 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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