Fabric Ducting Calculator
How to use the calculator
Choose your shape on the left hand side. Choose the units you’re most comfortable with M3/h or l/s or CFM
Choose how you want to select your duct – then grab the sliders and move them until you have the information you need.
For Example:- You know you have 1000l/s and you want a velocity of 5m/s in the duct. Input 1000l/s in the air volume box and then adjust the velocity to 5m/s with the slider – looking at the diameter it’s suggesting 520mm. As everything is made to order we can make a 520mm duct or you can input 500mm into the duct size box for a common duct size and you’ll see that it moves the velocity to 5.1m/s.
Velocity slider colours
Red = Too much velocity
Green = Generally in spec for Prihoda Fabric Duct
Blue = A comfortable selection
Please note the calculator is for guidance only. We do not take responsibility for your duct selections or sizes using this software; it’s for guidance only and we would always recommend you discuss specific selections with us.
Have fun!! 🙂