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# Air Ducts - Sizing

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Air flow, air velocity and required air-duct area:

• 1 ft/min = 5.08x10-3 m/s
• 1 ft3/min = 1.7 m3/h = 0.47 l/s
• 1 ft2 = 0.0929 m2 = 144 in2

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## Related Topics

### • HVAC Systems

Heating, ventilation and air conditioning systems - design and dimensions.

### • Ventilation

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

## Related Documents

### Air Duct Components - Minor Dynamic Loss Coefficients

Minor loss (pressure or head loss) coefficients for air duct components.

### Air Duct Velocities

Typical air duct velocities in applications like ventilation systems or compressed air systems.

### Air Ducts - Friction Loss Diagram

A major friction loss diagram for air ducts - SI units.

### Air Ducts - Friction Loss Diagram

A major friction loss diagram for air ducts - Imperial units ranging 10 - 100 000 cfm.

### Air Ducts - Velocity Diagram

Air flow volume, duct size, velocity and dynamic pressure.

### Circular Ducts - Dimensions

Standard size of circular ventilation air ducts.

### Duct Velocity

Calculate velocities in circular and rectangular ducts - imperial and SI-units - online calculator.

### Ducts or Pipes through Steel Joists - Maximum Sizes

Maximum sizes of ducts or pipes through K series joists.

### Ducts Sizing - the Velocity Reduction Method

The velocity reduction method can be used when sizing air ducts.

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