HVAC Buddy® Duct Calc

HVAC Buddy® Duct Calc$9.99

Rated 3.75/5 (28) —  Free Android application by Powertrade Services LLC

Advertisements

About HVAC Buddy® Duct Calc

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.

Review Notes
-----------------------------------------
A 12x12 duct matches FPM and CFM when friction is ignored which does not 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.

About Powertrade
--------------------------
Powertrade is the number one developer of mobile HVAC apps with professional looking, proven apps in the hands of over 20,000 users 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 available 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 units

How to Download / Install

Download and install HVAC Buddy® Duct Calc version 1.3 on your Android device!
Downloaded 1,000+ times, content rating: Everyone
Android package: com.gridbuddy.dbuddy, download HVAC Buddy® Duct Calc.apk

All Application Badges

Paid
app
Android
1.6+
For everyone
Android app

App History & Updates

What's Changed
Version 1.3 February 17, 2013 Corrects "App Not Licensed" problems.
Price update  Price changed from $9.99 to $11.08.
Price update  Price changed from $7.61 to $11.08.
Price update  Price changed from $9.99 to $7.61.
More downloads  HVAC Buddy® Duct Calc reached 1 000 - 5 000 downloads

What are users saying about HVAC Buddy® Duct Calc

J70%
by J####:

I used this app pretty regularly, but since the latest android update it will no longer open.

O70%
by O####:

Will update on the go.

X70%
by X####:

Nice app but it crashes nearly every time I open it and have to reopen.

N70%
by N####:

Does what it says but over priced with a cumbersome interface.

R70%
by R####:

Will update on the go.

I70%
by I####:

Like he said old school ductulators are steel duct. You old dogs need some new tricks. You've been calculating wrong for years. Old school ductlators are steel duct.

X70%
by X####:

Type in 12x12 duct and fpm should match cfm but it does not. Also no way to enter cfm and duct size to get resistance and fpm this app was obviously not made by an hvac professional

X70%
by X####:

All the numbers I get are wrong compared to the old school paper ductulator maybe I'm using wrong but I'm positive 8in round will flow 150 cfm less than 500fpm

X70%
by X####:

Useful tool when I am air balancing

X70%
by X####:

All my numbers are cut off grrrr.. Plz help

X70%
by X####:

Great app on the go


Share The Word!


Rating Distribution

RATING
3.85
28 users

5

4

3

2

1