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.
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.
• 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.
Terms of Service: https://ductcalc.ca/?page=agreement
User interface improvements and iPad compatibility.
Ratings and Reviews
Reliable and accurate resource to have on the go
What a great app. Been using the web version for a while sizing residential jobs. Nice to now have access to this on an app!! Very accurate. I can tell that a lot of time and effort was put into it’s development. Thank You for creating this !!!
Developer Response ,
Thanks for your valuable feedback :)
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Not sure where this pricing model comes from but it’s almost hilarious where these prices are coming from.
Developer Response ,
Thanks for your feedback Robert!
This is just the paid version of our freely available online web app (ductcalc.ca)
You can use the web based app for free!
It would be great if you can also email us what would be an affordable price for you and we will definitely look at it next time we change our prices :)
- Firas Kneifati
- 8.7 MB
Requires iOS 11.4 or later. Compatible with iPhone, iPad, and iPod touch.
- Age Rating
- Rated 4+
- © 2018 Firas Kneifati
- In-App Purchases
- One Month Full Air Flow $5.99
- Three Months Full Air Flow $14.99
- Six Months Full Air Flow $24.99
With Family Sharing set up, up to six family members can use this app.