DuctCalc.Ca is the iOS offline version of the most popular online ductulator app (ductcalc.ca) Enjoy using the app with no internet connection when subscribed! App engineering explanation: ------------------------------ Equal Friction Method: Using a predefined static pressure loss per unit of duct length, DuctCalc.Ca Ductulator App calculates the diameter of round duct and the other dimension of rectangular duct. Based on the calculated dimensions, the air velocity will be calculated for both duct shapes and dimensions. Velocity Method: Using a predefined air velocity, DuctCalc.Ca Ductulator App calculates the diameter of round duct and the other dimension of a rectangular duct. Based on the calculated dimensions, the static pressure loss will be calculated for both duct shapes and dimensions. Note that unlike conventional ductulators, this ductulator will calculate the dimensions of the rectangular duct based on the given velocity and it then calculates the static pressure loss for the rectangular duct based on the given velocity and dimensions. Most old calculators will only use the given velocity to calculate the diameter of the round duct then it calculates the static pressure loss for the round duct and uses that static pressure to calculate the rectangular duct dimensions which is not the case here for more precise velocity output. Colebrook equation is used to solve for Darcy's friction factor and calculates the static pressure loss in the duct until it matches the desired input at defined airflow and absolute roughness of the inner material of the duct touching the moving air. In-App Purchases: ------------------- • With no subscription the app will calculate for an air flow range between (950 and 1100 [cfm]). To activate full air flow functionality. There are four subscription options: one month, three months, six months and one year. • All subscription options will activate the "Full Air Flow Functionality" of the duct sizing app for that specific subscription period. The full air flow range is (1 to 500,000 [CFM] or 1 to 235,974 [L/s] in metric units). • Payment will be charged to iTunes Account at confirmation of purchase. • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Privacy Policy: https://ductcalc.ca/?page=agreement Terms of Service: https://ductcalc.ca/?page=agreement
Subscription
You have to pay to use the app.
Nice Graphical Interface
I like how it draws both duct shapes and shows the relative dimensions graphically in addition to showing the numbers. There is a little charge for using app, but it's the case for any quality app.
Nice Graphical Interface
I like how it draws both duct shapes and shows the relative dimensions graphically in addition to showing the numbers. There is a little charge for using the app but it’s the case for any high quality app.
Worth the money
The most user friendly app for duct design. It’s very easy to switch between friction and velocity methods and compare both rectangular and round duct dimensions. I’m surprised that there are some reviews here complaining about the little subscription payment they have to pay which is less than the cost of a cup of coffee a week. It’s definitely worth every penny! Strongly recommended
Very useful
The best app I have ever used. Very useful.
Paid app
Can’t do anything until you pay
Deceiving approach
The developer suggests that you can install it for free and then hits you with subscription costs in order to use the app. Unacceptable I received an extremely rude response for my review. Not only I would never use this application but never will use any application by this developer. I wish you luck with your attitude.
User interface improvement. Integration with ductcalc.ca/premium subscriptions.
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