Air supply ceiling diffusers with adjustable 1- to 4-way pattern perforated plate.
Explanation
PPTMB = Diffuser type
200 = Diffuser size (connection diameter)
Dimensions
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160 | 300 | 160 | | 200 | 400 | 200 | | 250 | 500 | 250 |
Quick selection
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| Q | Ak | 0.0302 | 0.0591 | 0.0976 | |
| 150 | Vz | H= | 2.7 | 0.97 | 0.32 | 0.19 | 0.69 | 0.23 | 0.14 | | | | | H= | 3.2 | 0.36 | 0.21 | 0.15 | 0.26 | 0.15 | 0.1 | | | | | H= | 3.8 | 0.21 | 0.15 | 0.11 | 0.15 | 0.1 | 0.08 | | | | | Vk | 1.4 | 0.7 | | | X0.25 | 2.4 | 2 | | | Ps | 8 | 2 | | | Lw(A) | 25 | <20 | | | 200 | Vz | H= | 2.7 | 1.29 | 0.43 | 0.26 | 0.92 | 0.31 | 0.18 | 0.73 | 0.24 | 0.15 | | H= | 3.2 | 0.49 | 0.28 | 0.19 | 0.35 | 0.2 | 0.14 | 0.27 | 0.16 | 0.11 | | H= | 3.8 | 0.28 | 0.19 | 0.15 | 0.2 | 0.14 | 0.11 | 0.16 | 0.11 | 0.08 | | Vk | 1.8 | 0.9 | 0.6 | | X0.25 | 2.8 | 2.3 | 2.1 | | Ps | 13 | 3 | 1 | | Lw(A) | 34 | <20 | <20 | | 250 | Vz | H= | 2.7 | 1.62 | 0.54 | 0.32 | 1.15 | 0.38 | 0.23 | 0.91 | 0.3 | 0.18 | | H= | 3.2 | 0.61 | 0.35 | 0.24 | 0.43 | 0.25 | 0.17 | 0.34 | 0.2 | 0.14 | | H= | 3.8 | 0.35 | 0.24 | 0.19 | 0.25 | 0.17 | 0.13 | 0.2 | 0.14 | 0.11 | | Vk | 2.3 | 1.2 | 0.7 | | X0.25 | 3.1 | 2.6 | 2.3 | | Ps | 22 | 6 | 2 | | Lw(A) | 42 | 22 | <20 | | 300 | Vz | H= | 2.7 | | | | 1.38 | 0.46 | 0.28 | 1.09 | 0.36 | 0.22 | | H= | 3.2 | | | | 0.52 | 0.3 | 0.21 | 0.41 | 0.23 | 0.16 | | H= | 3.8 | | | | 0.3 | 0.21 | 0.16 | 0.23 | 0.16 | 0.13 | | Vk | | 1.4 | 0.9 | | X0.25 | | 2.9 | 2.5 | | Ps | | 8 | 3 | | Lw(A) | | 28 | <20 | | 400 | Vz | H= | 2.7 | | | | 1.85 | 0.62 | 0.37 | 1.46 | 0.49 | 0.29 | | H= | 3.2 | | | | 0.69 | 0.4 | 0.28 | 0.55 | 0.31 | 0.22 | | H= | 3.8 | | | | 0.4 | 0.28 | 0.21 | 0.31 | 0.22 | 0.17 | | Vk | | 1.9 | 1.1 | | X0.25 | | 3.4 | 3 | | Ps | | 15 | 5 | | Lw(A) | | 38 | 23 | | 600 | Vz | H= | 2.7 | | | | | | | 2.19 | 0.73 | 0.44 | | H= | 3.2 | | | | | | | 0.82 | 0.47 | 0.33 | | H= | 3.8 | | | | | | | 0.47 | 0.33 | 0.25 | | Vk | | | 1.7 | | X0.25 | | | 3.8 | | Ps | | | 12 | | Lw(A) | | | 36 | | 800 | Vz | H= | 2.7 | | | | | | | 2.92 | 0.97 | 0.58 | | H= | 3.2 | | | | | | | 1.09 | 0.63 | 0.44 | | H= | 3.8 | | | | | | | 0.63 | 0.44 | 0.34 | | Vk | | | 2.3 | | X0.25 | | | 4.7 | | Ps | | | 22 | | Lw(A) | | | 46 |
Symbols and specifications
- Q = Air Volume in m³/h
- Ak = Effective surface (free area) in m²
- B = Distance between diffusers in m
- H = Installation height of the diffusers in m
- Vz = Maximum velocity at the occupied zone regarding distance between diffusers and installation height in m/s
- 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 table values are given for the adjustable deflection plates set at its standard position to achieve an air flow pattern in 4 direction
- 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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