Ductulator - Duct Sizer

response required

So, there is a couple flaws with this app. It is pretty well put together. But there are no instructions and you cannot contact the developer to ask for a correction. It shows the velocity drops as the duct size gets smaller. I can’t tell if I am just using the wrong calculator or something I set is changing the cfm as I change the duct size. I have gone back to my paper one. I was hoping. It surprises me. This is pure math. It ought to be easy. Also, it would be nice if there were a formula built in for the equivalent length ie anything over 100’.

Kept so simple and familiar, thank you and well done. I bet you can even get the old timers to buy this one. Perhaps a friction loss only lock, or markable/highlight-able values in a future update. Thank you for nicely done app

Great app

response required

I slid the dials to where I needed to obtain my reading, never was able to figure it out. Deleting it now, Hoping to have better luck with another app.

response required

Scrapped this app and bought a different one.