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

This is an AMP page - Open full page! for all features.

the most efficient way to navigate the Engineering ToolBox!

Rectangular Ducts - Hydraulic Diameter

Calculate hydraulic diameter for rectangular ducts - metric units.

Sponsored Links

Hydraulic diameter for rectangular ducts can be calculated as

d_h = 2 a b / (a + b) (1)

where

d_h = hydraulic diameter (mm, in)

a = width of the duct (mm, in)

b = height of the duct (mm, in)

Hydraulic diameter of some common rectangular ducts:

Hydraulic Diameter - d_h - (mm)
Width of Duct (mm)	Height of Duct (mm)
Width of Duct (mm)	100	150	200	250	300	400	500	600	800	1000	1200
200	133	171	200
250	143	188	122	250
300	150	200	222	273	300
400	160	218	240	308	343	400
500		231	267	333	375	444	500
600		240	286	353	400	480	545	600
800			300	381	436	533	615	686	800
1000			320	400	462	571	667	750	889	1000
1200					480	600	706	800	960	1091	1200
1400						622	737	840	1018	1167	1292
1600						640	762	873	1067	1231	1371
1800							783	900	1108	1286	1440
2000							800	923	1143	1333	1500

Sponsored Links

Related Topics

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

Related Documents

Flow Section Channels - Geometric Relationships - Geometric relationships like area, wetted perimeter and hydraulic diameter.
Fluid Flow - Equivalent Diameter - Convert rectangular and oval duct geometry to a equivalent circular diameter - online calculator with imperial and SI-units.
Fluid Flow - Hydraulic Diameter - Calculate hydraulic diameter for pipes and ducts.

Sponsored Links

Share

Search Engineering ToolBox

the most efficient way to navigate the Engineering ToolBox!

SketchUp Extension - Online 3D modeling!

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 Extension Warehouse!

About Engineering ToolBox!

Contact - Citation - Copyrights - Advertising - Warranty and Liability

Privacy

We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.

Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.

Google use cookies for serving our ads and handling visitor statistics. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected.

AddThis use cookies for handling links to social media. Please read AddThis Privacy for more information.

Advertise in the ToolBox

If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. You can target the Engineering ToolBox by using AdWords Managed Placements.