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About the application:

The best and number one selling duct sizing program for Android device devices with thousands of satisfied players. For less than the cost of a cardboard wheel ductulator always have a quick, accurate method 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 different troops - 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 Troops • Round to Odd Units Calculations are based on friction loss equations in the ASHRAE Handbook of Fundamentals 2009. Review Notes ----------------------------------------- A 12x12 duct matches FPM and CFM when friction is ignored which does not happen in true 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 kind of duct chosen. Also, for the times when you wish to receive friction given CFM and Duct use the "Airflow" tab, choose the "ft/min" checkbox and move the slider accordingly. There are a lot of methods to drive the begin variable. Accuracy: ----------------------------------------- Calculations have been verified versus ASHRAE fundamentals and a few another 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 Help email link for any questions or concerns. About Powertrade -------------------------- Powertrade is the number one developer of mobile HVAC apks with professional looking, proven apks in the hands of over 20,000 players worldwide. Powertrade HVAC Buddy® Applications: ------------------------- NEW! HVAC Buddy® Load Calc - Improve accuracy when sizing equipment, demonstrate professionalism on the job, and add substance to your proposals by using our heat loss and heat gain calculation app. HVAC Buddy® Load Calc (Apple) - Also accessible on iOS devices - iPhone, iPad HVAC Buddy® - Refrigerant charging and diagnostics. HVAC Buddy® Pressure Temperature - Traditional PT Chart with 71 Refrigerants in Metric or Imperial troops