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.
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:
  1. Enter refrigerant, temps, and pressures
  2. The math is done for you; superheat calculations, subcooling calculations, and airflow calculations all display Target, Actual, and Difference
  3. Repeat steps 1-2 until all HVAC Diagnostics check out as "Okay"; send system status report VIA text message or email as needed
  4. Sync customer units and customer diagnostics to the cloud with FLEETGRID

R-11, R-113, R-114, R-115, R-116, R-12, R-123, R-1234YF, R-1234ZE, R-124, R-125, R-1270, R-13, R-134A, R-141B, R-142B, R-143A, R-152A, R-21, R-218, R-22, R-227ea, R-23, R-236ea, R-236fa, R-245ca, R-290, R-32, R-365MFC, R-401A, R-401B, R-401C, R-402A, R-402B, R-403A, R-403B, R-404A, R-405A, R-406A, R-407A, R-407B, R-407C, R-407D, R-407E, R-407F, R-408A, R-409A, R-409B, R-41, R-410A, R-410B, R-411A, R-411B, R-412A, R-413A, R-414A, R-414B, R-415A, R-415B, R-416A, R-417A, R-418A, R-419A, R-420A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-423A, R-424A, R-425A, R-426A, R-427A, R-428A, R-429A, R-430A, R-431A, R-432A, R-433A, R-434A, R-435A, R-436A, R-436B, R-437A, R-438A, R-441A, R-442A, R-443A, R-444A, R-448A, R-449A, R-500, R-501, R-502, R-503, R-504, R-507A, R-508A, R-508B, R-509A, R-510A, R-512A, R-600, R-600A, R-601, R-601A, R-717, R-744, R-E170

Accolades and Awards:
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.


Run your business straight from the cloud. Use your smart phone or web broswer. Generate estimates on the fly, get the job done, and complete invoices. With our simple and easy to use field service software everyone stays on track and in the loop; companies save, customers are happy, and the pros get paid fast!


As an admin, office staff, or employee, orchestrate service pros in the field and showcase professionalism to the end consumer.


As a service professional in the field, with the tools at hand drive repeat business and referrals by getting the job done.


As a home owner requiring field service, communicate with the back office and check service professional's progress in the field.