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tag:The best and number one selling duct sizing tool for Android devices with thousands of happy users. For less t...
$ 9.99
The best and number one selling duct sizing tool for Android devices with
thousands of happy users. For less than the cost of a cardboard wheel
ductulator always have a fast, accurate way to analyze ducts for design (by
Airflow) or existing installations (by Size).
Airflow Tab
• Calc decimal & rounded sizes for any aspect ratio
• Solve for Volume, Aspect Ratio, Friction, or Velocity
Size Tab
• Calc Friction and Velocity given duct size
Settings Tab:
• Enter various units - Airflow (cfm, m3/s, l/s, m3/hr) Friction (in/100',
Pa/30m), Duct Sizing (in, cm), Velocity (ft/min, m/s)
• Define standard air - Altitude (ft, meter), Temperature (Fahrenheit,
Celsius), Relative Humidity (pct)
• Displays calculated Kinematic Viscosity (ft2/s) and Specific Volume (ft3/lb)
Material Types:
• PVC
• Aluminum
• Galvanized Steel
• Spiral Steel
• Smooth Liner
• Fiber Liner
• Flex Duct
Duct Shapes:
• Round
• Rectangular
• Oval
Duct Sizing
• Round to Even Units
• Round to Odd Units
Calculations are based on friction loss equations in the ASHRAE Handbook of
Fundamentals 2009.
@Rick the reviewer:
-----------------------------------------
A 12x12 duct matches FPM and CFM when friction is ignored which cannot happen
in real life. This relationship changes based on the properties of air (see
kinematic viscosity on the settings tab) and on the friction value determined
via the type of duct selected. Also, for the times when you want to get
friction given CFM and Duct use the "Airflow" tab, select the "ft/min"
checkbox and move the slider accordingly. There are many ways to drive the
open variable.
Accuracy:
-----------------------------------------
Calculations have been verified against ASHRAE fundamentals and several other
references. There are more input criteria (such as duct material) than
velocity, friction, and size mentioned in the review which the reviewer may
not have taken into consideration. Use the Support email link for any
questions or concerns.
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3
out of
22 reviews
Last update
Feb. 15, 2013