Win32 and 64, English

SoftDraft, LLC
HVAC Square / Rectangular Duct is a quick input parametric 3D drafting program for the creation of 3D Square / Rectangular Duct and Fittings.

General Usage Instructions

This program is used to create 3D Square / Rectangular Duct fittings which can be used for presentations or extract the 2D views from the 3D model.



Ribbon/Toolbar Icon Command Command Description


This displays the main Square / Rectangular Duct Fittings dialog. From this dialog select the fitting type then select from one of the type options to go to the final dialog for adding the duct size and other dimensions. Press Ok on this dialog and the fitting is created and ready for placement.


The installer that ran when you downloaded this app/plug-in from Autodesk App Store will start installing the app/plug-in. OR, simply double-click the downloaded installer to install the app/plugin.

You may need to restart the Autodesk product to activate the app/plug-in.

To uninstall this plug-in, exit the Autodesk product if you are currently running it, simply rerun the installer, and select the "Uninstall" button. OR, click Control Panel > Programs > Programs and Features (Windows 7/8.1/10/11) and uninstall as you would any other application from your system.

Additional Information

You have 15 days to activate the software. When running in non-activated mode this dialog will only appear once the first time the program is executed in a new or existing drawing which indicates the number of Days Remaining before the program stops. Until you are ready to activate the software, you can run the software in the Non-Activated mode before it expires.

To activate the software, when you open a new or existing drawing a dialog appears prompting you to press the "OK" button to Activate Now. This takes you to the SoftDraft Activation dialog showing your License Code and an edit box for you to enter the License Key.

To receive your License Key, click on the License Code edit box, then copy the License Code. To avoid mistakes, we suggest that you copy it from this dialog and paste it into an email, instead of entering it with the keyboard, then send it to 
Please include the name the app was purchased under and the company name. After we receive the email we will send the License Key back, usually within 24 hours, for you to enter into the dialog. Copy the License Key from the email into the License Key edit box area of the Activation dialog, then click "OK" to close the dialog.

Known Issues

Not for use with Autodesk® AutoCAD LT® Versions.


Company Name: SoftDraft, LLC
Support Contact:

Author/Company Information

SoftDraft, LLC

Support Information

SoftDraft Software Support Policy


SoftDraft Software Support Policy

The purchase price of a new SoftDraft Software product includes: 

Free technical support during the course of the Subscription.  

Each computer requires a separate Product license to be purchased for that computer. 

The SoftDraft Software Subscription includes upgrades when available. 

All updates/upgrades are electronically downloadable.

Version History

Version Number Version Description


Update for subscription version
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