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

Air Ducts - Friction Loss Diagram

Major loss diagram for air ducts - in imperial units ranging 10 000 - 400 000 cfm

Sponsored Links

Friction loss (head loss) in standard air ducts:

air ductwork friction loss diagram

The diagram is based on standard air 0.075 lb/ft3 in clean round galvanized metal ducts.

  • 1 inch water = 248.8 N/m2 (Pa)= 0.0361 lb/in2 (psi) = 25.4 kg/m2 = 0.0739 in mercury
  • 1 ft3/min (cfm) = 1.7 m3/h = 0.47 l/s
  • 1 ft/min = 5.08x10-3 m/s
  • 1 inch = 25.4 mm = 2.54 cm = 0.0254 m = 0.08333 ft

Example - Friction Loss in Air Duct

Friction loss in a 60 inches duct with air flow 100,000 cfm can be estimated to approximately 0.4 inches water per 100 feet duct as shown in the diagram below. Air velocity can be estimated to approximately 5000 feet per minute.

ductworks friction loss diagram example 

Sponsored Links

Related Topics

Related Documents

Tag Search

  • en: Air Ducts Friction Loss Diagram
Sponsored Links

Search 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 the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the SketchUp Pro Sketchup Extension Warehouse!

Translate this page to
About the Engineering ToolBox!

Citation

This page can be cited as

  • Engineering ToolBox, (2008). Air Ducts - Friction Loss Diagram. [online] Available at: https://www.engineeringtoolbox.com/ductwork-friction-loss-d_1131.html [Accessed Day Mo. Year].

Modify access date.

Customize Ads in the ToolBox

Make ads more useful in Google Ad Settings .

. .

close

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!

Scientific Online Calculator

Scientific Calculator

4 20

Sponsored Links
.