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HVAC Buddy®

By Kevin Burandt

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Make your job easier with our handy refrigerant charging and diagnostic HVAC app - HVAC Buddy®. If you are servicing equipment the best way to begin diagnosis and determine the proper refrigerant charge is to use HVAC Buddy®, a set of gauges, and a thermometer.

• Superheat for fixed capillary or Subcool forTXV/EXV systems
• Calculates targeted vs. actual Subcooling
• 4 refrigerants including R-22 (Freon), R-410A (Puron), R-404A, R-134A
• Airflow / Delta-T / TEET Calculation
• Diagnosis tab for leaks, overcharge, contaminants, etc.
• Email System Status Report
• Imperial (IP) or Metric (SI)
• Use Target Superheat and Subcool tables or enter manually
• Update all values with realtime output
• User friendly with step by step instructions

if the early outdoor temperature is 75F and you charge the system to a “beer can cold” suction line your system is likely improperly charged. Later in the afternoon high temperatures will increase head pressure and the resulting overcharge means a lower than desired superheat and wasted energy. Not good!

Overall Process:

• Enter refrigerant, temps, and pressures
• The math is done for you to display Superheat, Subcool and Airflow Target, Actual, and Difference
• Email all readings (detail)

Other Features:

• Flexible units - psi, kPa, Fahrenheit, Celsius, etc.
• Calculates Superheat and Subcool targets
• Airflow - For cooling, compares a targeted difference across the coil vs. actual. Also called Delta-T or Target Evaporator Exit Temperature (TEET).
• Diagnosis - shows common causes for high and low superheat, subcooling.
• Instructions - Detailed step by step instructions and knowledge base at
• System Status Report - Use the email tab to create defaults for email addresses, subject, and System Status Report introductory text. Tap the email button and these values are incorporated into a formatted page including all the parameters recorded in HVAC Buddy. Edit the email and / or add contacts from your contact list. Then on each service call it's just a couple taps to send a personalized report.

Accolades and Awards:
HVAC Buddy® ranked #2 in readers choice of top 10 contracting apps August 2011.

HVAC Buddy® was featured by the California Association of HERS Raters and is CalHERS approved!

"Very cool app. I can see California really running with this as we have strict requirements for verification." - John Richau, Executive Director, Calhers

"an excellent programme" - Charlie Richards

** Also available on Windows Phone 7 and Android **

NEW! HVAC Buddy® Load Calc - Now Available

HVAC Buddy® GridBuddy - Store customers, units. Calculate and compare 30+ system operating characteristics.

HVAC Buddy® Duct Calc - Powerful tool with a simple to use real-time interface to help you choose optimal duct sizes.

HVAC Buddy® Pressure Temperature - Over 90 Refrigerant combinations and their corresponding PT relationship in Metric or Imperial units.

HVAC Buddy® Psychrometric - Quickly calculate thermodynamic properties of moist air at temperatures commonly used in HVAC systems. Enter multiple sets of properties, mix air streams.

What's New in Version 2.1

Updated libraries

iPhone Screenshot

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Customer Reviews

Great App

I love this app but it would be nice if you add more refrigerants such as MO99, 407c, 417, etc. As time goes on it's more common to find these retrofit refrigerants being used and it would be nice if this app would include at least these few. Once again I will say I love this app only missing a few minor details.

Cool app

Very accurate easy to use I use it every day worth the money for sure. (TO DEVELOPERS Just hoping for a UPDATE SOON!) We love the functionality of the app but a but tired of the look needs a FRESH LOOK!!!

Use it a lot

This app has made my life so much easier. I can calculate and document the operation of the equipment and never look at a tp chart or use calculator. Love it.

HVAC Buddy®
View In iTunes
  • $9.99
  • Category: Business
  • Updated:
  • Version: 2.1
  • Size: 0.5 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 5.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

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