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Volume, Velocity and Pressure
| Volume |
= |
velocity x area |
| Velocity |
= |
volume ÷ area |
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| Recommended Extraction Velocities: |
| In duct: |
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Less than 7.5 m/s |
| Discharge: |
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Between 7.5 and 10 m/s |
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| Volume: |
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1 m3/s |
= |
2119 ft3/min |
| Velocity: |
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1 m/s |
= |
196.8 ft/min |
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1 m/s |
= |
1000 l/s |
| Pressure: |
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1 inch wg |
= |
25.4 mm wg |
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1 inch wg |
= |
249.1 Pa |
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1 Pa |
= |
1 Nm2 |
BS7258 recommended minimum distances for avoiding
disturbances to fume cupboard and operator
| FC |
Fume Cupboard |
| BT |
Bench Top |
| C |
Column |
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Wall above worktop height |
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Traffic or escape route |
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Area in which air should be undisturbed
by anyone other than the operator |
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Operator |
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All dimensions are in mm.
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FAN
HANDLINGS (VIEWED FROM INLET)
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