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Engineering ToolBox - enabled for use with the older versions of the amazing SketchUp Make and the newer "up to date" SketchUp Pro .

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Circular Air Ducts - Metric Units

HVAC Circular Ducts - metric units


Add standard ducts to your Sketchup model by clicking "insert!

Customized ducts can be added by modifying the "custom!" row.

Rotate the screen or widen the window to see full table!

Circular Air Ducts - Metric Units
Nominal Diameter
Outside Diameter
Wall Thickness
Inside Area
insert! 60 63 1 0.003
insert! 80 80 1 0.005
insert! 100 100 1 0.008
insert! 125 125 1 0.012
insert! 160 160 1 0.020
insert! 200 200 1 0.031
insert! 250 250 1 0.049
insert! 315 315 1 0.078
insert! 400 400 1 0.126
insert! 500 500 1 0.196
insert! 630 630 1 0.312
insert! 800 800 1 0.502
insert! 1000 1000 1 0.785
insert! 1250 1250 1 1.227

Change before insert!
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Tools - accessed from within Sketchup

NOTE!! - the insert! and the Tools features only works when the engineeringtoolbox exension is opened from within SketchUp. Install the extension as described in the right column - restart Sketchup and open this tool from the Sketchup Plugins menu.


undo!   redo!


  change color!

Change color of the selected object(s) - may be slow for some more complicated objects (save your model first!)


iso!   top!   front!   right!   left!   back!   bottom!

Make Component


Makes a component of the selected object. Note that all objects from the Engineering Toolbox are inserted as individual groups. You should transfer a group to a component sharing the same definition when there is more than one instance of the same object. Tip! Rename the object to its final name before making it a component (in outliner or with right click and entity info).

Rotate Object(s)

around red!  , green!   or blue!   axis.

Select object(s) first. This tool may be very handy for objects with curved surfaces like pipes, elbows and so on.

Move or Copy Object(s)


Move or copy (multiple) selected objects. Make advanced geometric constructions with multiple selections, multiple copies and the offset. Tip! - Use "Make Component" to save space and reduce computer load when working with multiple copies.


insert the Knife!   cut!

Before cut - customize the inserted Knife! The Knife is a group you can rotate, change the size of, and even add or remove objects within (example - add a function curve for an advanced cut). You can also make your own Knife by naming a group "theKnife". After insert and customizing the knife - positioning it to the object(s) where to cut - select the object(s) (must be groups) - and click cut! Afterwards - select the object(s) and remove the parts of the object(s) that you don't want. YouTube demo of the Knife!

Move an Object to an other Objects Position


Select two objects - click "move" - and one of the objects moves to the position and angle of the other object. This tool may be handy when moving objects between axis systems.

Insert (Reference) Line


  endpoint         insert!

This tool can be used to add reference lines.

Insert Horizontal Plane


Insert Vertical Plane



Insert Box


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