Air Velocities in Ducts

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Air velocities in ducts should not exceed certain limits to avoid high pressure losses and unacceptable noise generation. The values below are common guidelines for some typical applications.  

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Related Topics

• Ventilation - Systems for ventilation and air handling - air change rates, ducts and pressure drops, charts and diagrams and more

Related Documents

• Air Duct Velocity Diagram - Air flow volume, duct size, velocity and dynamic pressure
• Air Ducts Friction Loss Diagram - Major loss diagram air ducts - SI units
• Air Ducts Friction Loss Diagram - Major loss diagram air ducts - Imperial units ranging 10 - 100 000 cfm
• Air Ducts Minor Loss Coefficient Diagrams - Minor loss coefficient diagrams for air ductwork, bends, expansions, inlets and outlets  - SI units
• Air-Duct Sizing - Air flow and required duct area
• Duct Velocity - Calculate velocities in circular and rectangular ducts - imperial and SI-units - online calculator
• Equal Friction Method - The equal friction method of sizing ducts is easy and straightforward to use
• Friction Loss in Ducts - Friction loss or major loss in ducts - equations and online calculator for rectangular and circular ducts - imperial units
• Rectangular Air Ducts Velocity Diagram - Velocity diagram rectangular air ducts
• Sizing Ducts - The ductwork of ventilation systems are often sized with either the Velocity, the Constant Pressure Loss (or Equal Friction Loss) - or the Static Pressure Recovery Methods