Typical air duct velocities in applications like ventilation systems or compressed air systems.
Air velocities in ducts and pipes should not exceed certain limits to avoid high pressure loss and unacceptable noise generation. The values below can be used as guidelines for some typical applications.
|Air Ducts||Air Velocity|
|Combustion air duct||12 - 20||2400 - 4000|
|Air inlet to boiler room||1 - 3||200 - 600|
|Warm air for house heating||0.8 - 1.0||150 - 200|
|Vacuum cleaning pipe||8 - 15||1500 - 3000|
|Compressed air pipe||20 - 30||4000 - 6000|
|Ventilation ducts in hospitals||5 - 8||1000 - 1500|
|Ventilation ducts in office buildings||7 - 11||1200 - 2000|