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C.A.T.S. Software GmbH

The Company
dedicated to
building engineering!

C.A.T.S. App "duct calculator" - for free!ductbild

Our app "C.A.T.S. duct calculator" is getting more popular by the day - also internationally! Up to now there have been more than 20.000 downloads.

Our duct calculator lays out like a conventional channel slide round, square and oval ventilation channels.
In addition, it calculates the channel surface and the insulation allowance.

Both the metric system (mm) and the imperial system (inches) are supported.
The android version of this app is available in Google Play Store in English, Italian and German and is for free. Download

An IOS version will be available in some weeks. Enjoy!


CAD for Sprinkler Technology

Our CAD system for sprinkler technology has been used successfully by installation companies and planners for more than 25 years.

The integrated calculation according to the Hazen-Williams and Darcy-Weisbach method, as well as the calculation of foam, are authorized by the Association of Insurers VdS.

See the application in practice or test our free 15-day version.

PLEASE NOTE: We now offer the possibility of using our separate Windows calculation without CAD - free 15-day version sprinkler calculation for Windows.



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Only the highest customer satisfaction ensures long-term success in a small branch of trade! Read more about our culture

Produkte ON


We offer a wide variety of products - sprinkler, ventilation, piping and electrical with integrated calculation. Have a look at our diversified product portfolio and feel free to contact us directly if any questions should arise.

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You are welcome to test our software - submit your contact data and then download the latest Testversion.