Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

Air Ducts - Friction Loss Diagram

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

Friction loss in standard air ducts:

air ducts - pressure loss vs- air flow chart - m3/s. m/s, mmDownload and print Air Duct Pressure Loss vs. Air Flow and Duct Dimension Chart

  • 1 m/s = 196.85 ft/min
  • 1 m3/s = 3600 m3/h = 1000 dm3(liter)/s = 35.32 ft3/s = 2118.9 ft3/min = 13200 Imp.gal (UK)/min = 15852 gal (US)/min
  • 1 mm H2O = 9.81 Pa = 9.807x10-6 N/mm2 = 0.0987 10-3 bar = 1 kp/m2 = 0.09678 10-3 atm = 1.422 10-3 psi (lbf/in2)

Example - Air Duct and Friction Loss

As indicated in the diagram above, the friction loss in a 500 mm main duct with air flow 1 m3/s  - in a comfort system with air velocity limited to 5 m/s - can be estimated to 0.55 Pa/m (0.055 mm H2O/m).

Related Topics

  • Ventilation Systems

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

Related Documents

Search

Search is the most efficient way to navigate the Engineering ToolBox.

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with older versions of the amazing SketchUp Make and the newer "up to date" SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp Make/Pro from the Extension Warehouse !

Translate this Page

Translate this page to Your Own Language .

About the Engineering ToolBox!

Privacy Policy

We don't collect information from our users. More about

We use a third-party to provide monetization technologies for our site. You can review their privacy and cookie policy here.

You can change your privacy settings by clicking the following button: .

Citation

This page can be cited as

  • The Engineering ToolBox (2008). Air Ducts - Friction Loss Diagram. [online] Available at: https://www.engineeringtoolbox.com/air-duct-friction-loss-diagram-d_328.html [Accessed Day Month Year].

Modify the access date according your visit.

3D Engineering ToolBox - draw and model technical applications! 2D Engineering ToolBox - create and share online diagram drawing templates! Engineering ToolBox Apps - mobile online and offline engineering applications!

Unit Converter

















































11.4.12

.