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84.0
 5 votes - Business - First release: 2009-08-20T21:47:40Z

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Description - 4+

Make your job easier with our 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 Subcooling forTXV/EXV systems
 • Calculates targeted vs. actual Subcooling 
 • Over 100 refrigerants including newer azeotropic blends
 • Airflow / Delta-T / TEET Calculation
 • Email System Status Report
 • Imperial (IP) or Metric (SI)
 • Use Target Superheat and Subcooling tables or enter manually
 • Update all values with realtime output
 • Line Chart displays historical values based on input changes or elapsed time

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, Subcooling and Airflow Target, Actual, and Difference
 • Email all readings (detail)

Other Features:

 • Flexible units - psi, kPa, Fahrenheit, Celsius, etc.
 • Calculates Superheat and Subcooling targets
 • Airflow - For cooling, compares a targeted difference across the coil vs. actual.  Also called Delta-T or Target Evaporator Exit Temperature (TEET).
 • 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:
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HVAC Buddy® ranked #2 in ContractingBusiness.com readers choice of top 10 contracting apps.

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

HVAC Buddy® Load Calc - Now Available

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.