• HVAC Duct Calculator 1
  • HVAC Duct Calculator 2
  • HVAC Duct Calculator 3
  • HVAC Duct Calculator 4

HVAC Duct Calculator

HVAC Duct Calculator™ developed by Smart Apps Genius group is a handy App for air duct sizing and pressure drop calculations, useful for both round and rectangular ducts. A unique feature of this App is that it enables the user to select the unit of parameters in any combination. Calculation of pressure drop has been based on Darcy-Weisbach equation and Colebrook formula.

Category : Tools

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Reviews (16)

Bal. S. Dec 7, 2019     

I like it. Useful to check the duct size with relate parameters.

Reb. D. Jun 17, 2019     

Great App, very helpful. 😃

Nyo. K. Sep 7, 2019     

The best free application for HVAC Duct sizing

sae. j. Aug 30, 2019     

Best aplication

Ema. A. Mar 15, 2018     

Overall I like the app. What I don't like, every time I start the app I have to click on "duct size velocity" ant to set 500 fpm. The app can't "remember" this preferences, goes to the default mode. Maybe a great addition could be adding internal liner (1/2" and 1"). The ductulator can show both outside and inside duct dimensions. Also, the tabs for altitude and pressure drop are so wide! Was useful to have them narrow like others, eventually airflow, velocity and duct sizes could be wider for easy access.

A. G. u. Jul 8, 2018     

Lovely just what i needed thank you very much this is the first 5 stars ip ever gave in my whole 23 year old life.

Fou. L. Sep 22, 2017     

Not too much flexibility in terms of varying inputz and changing units. Also interface is not intuitive and hard to use.

Mar. G. Dec 28, 2017     

The app is easy to use and has several options for computing friction loss. It should be noted that the velocity presented is the velocity in a duct of equivalent diameter, not the velocity in the actual rectangular duct - but that seems to be the common approach based on ASHRAE standards.

Fat. S. Sep 23, 2017     

It has lots of different unit selection options and 2 different user interface which is very useful.

Far. A. Oct 22, 2017     

Very useful for fast estimation and calculation. Very flexible at different units.

lie. Sep 4, 2017     

Very useful and simple and of course free

say. s. H. Aug 22, 2017     

nice and useful !!

Mer. A. Aug 16, 2017     

It's a time saver!

Art. S. Jun 11, 2018     

Cannot solve for cfm based on other criteria except trial and error. Does not have an option for the industry standard nomagraph wheel. Does not allow moving app install to SD card. Pretty disappointing, probably will have to pay for a better one.

A. G. u. Aug 16, 2017     

Very useful and free.

myo. k. Aug 26, 2017     

Thank so much