Air Rectangular and Round Duct Calculation Velocities Pressure Drops Their Fittings Pressure Drops
Air Duct Calculation Velocities Pressure Drop
Updated on
Sep 28, 2026
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Ratings and reviews
phone_androidPhone
tablet_androidTablet
2.3
190 reviews
5
4
3
2
1
Ricardo Amado
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November 25, 2022
The app does what is supposed to do. Giving 1 star because you can't use it, is misleading to other users. More the author seems alwyas availiable to give support to the ones who have issues.
2 people found this review helpful
Cem Yedikardes
November 25, 2022
I am so glad for your comment thanks a lot.....
Edward Lim
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March 3, 2023
Good & friendly to use. Would be even better if can have pressure loss calculation for butterfly split duct fitting & aspect ratio indication.
2 people found this review helpful
Cem Yedikardes
March 3, 2023
Thanks a lot I will try
Erkan Erpolat
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June 28, 2020
Very simple and efficient way of calculation! Must-have for engineering inspections and basic calculations!..
13 people found this review helpful
What’s new
New: System Design. Calculate a complete duct system: critical line from the grille to the fan, several circuits (AHU, exhaust), elbows, accessories, air conditions and duct materials, external static pressure and PDF report.