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"S-bend calculation" will help you to moderation length of the spiral channel, select the bend and size the duct system. The app simplifies everyday life for you as ventilation fitter. Without fuss or hard-tables!

Calculate channel length

Enter the diameter and the offset and get suggestions on channel length in relation to the angle of the bend. Here's a simple and clear overview of what lengths that work for any angle. Key in diameter, angle and center offset - calculated and ready!

Flow table

Using this transparent flow table, you can easily choose the size of spiral duct and dimension throughout the ventilation system. Smoother as it gets!