Age Rating
Fan Law Calculator Screenshots
About Fan Law Calculator
The Fan Law Calculator App has been designed to allow quick estimation of the performance impact of variation in airflow and/or rpm on an existing system. The standard fan law equations are used to estimate the system performance changes.
Input the current values for airflow, rpm, pressure and current (or power) into the appropriate text field. The calculations will automatically update as you type.
The updated values can be input in one of two ways. The new values can be entered into the appropriate text field. Or, you can drag the airflow value left and right on the graph view to change the values. The calculations will automatically update as you edit the values.
Calculations
The standard fan law equations are applied:
cfm2 = cfm1 * rpm2/rpm1
sp2 = sp1 * (cfm2/cfm1)^2
power2 = power1 * (cfm2/cfm1)^3
Notes:
This application (App) is provided for use by qualified HVAC engineers and designers in the design of air handling systems and is not a substitute for appropriate design services. When in doubt, contact a design
Input the current values for airflow, rpm, pressure and current (or power) into the appropriate text field. The calculations will automatically update as you type.
The updated values can be input in one of two ways. The new values can be entered into the appropriate text field. Or, you can drag the airflow value left and right on the graph view to change the values. The calculations will automatically update as you edit the values.
Calculations
The standard fan law equations are applied:
cfm2 = cfm1 * rpm2/rpm1
sp2 = sp1 * (cfm2/cfm1)^2
power2 = power1 * (cfm2/cfm1)^3
Notes:
This application (App) is provided for use by qualified HVAC engineers and designers in the design of air handling systems and is not a substitute for appropriate design services. When in doubt, contact a design
Show More
What's New in the Latest Version 1.2
Last updated on Feb 9, 2024
Old Versions
Bug fixes and improvements.
Show More
Version History
1.2
Feb 9, 2024
Bug fixes and improvements.
1.1
Sep 25, 2019
• iOS 13 updates
• Dark mode
• Dark mode
1.0.3
Sep 23, 2016
Found and fixed another iOS 10 crasher.
1.0.2
Sep 20, 2016
- Updated for iOS 10
- Fixed startup crasher in iOS 10
- Fixed startup crasher in iOS 10
1.0.1
May 27, 2016
Fixed app store URL in "Please Rate Fan Law Calculator".
Other minor improvements.
Other minor improvements.
1.0
May 24, 2016
Fan Law Calculator Price
Today:
$4.99
Lowest:
$4.99
Highest:
$6.99
Fan Law Calculator FAQ
Click here to learn how to download Fan Law Calculator in restricted country or region.
Check the following list to see the minimum requirements of Fan Law Calculator.
iPhone
Requires iOS 13.0 or later.
iPad
Requires iPadOS 13.0 or later.
iPod touch
Requires iOS 13.0 or later.
Fan Law Calculator supports English