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HVAC Grid Buddy

HVAC Grid Buddy
  • #: 127662
  • Price: free ($0.00) In Apple Store
  • Category: Business
  • Updated: 2013-02-22
  • Current Version: 1.1.1
  • 1.1.1
  • Size: 2.10 MB
  • Language: English
  • Seller: Kevin Burandt
  • Requirements: Compatible with iPhone, iPod touch, and iPad. Requires iOS 3.1.2 or later
  • © Powertrade
  •  Add to Favorite apps



HVAC Buddy® GridBuddy is a tool for professional technicians to differentiate themselves from the "Gas and Go" crowd. By utilizing standard measurements and observations that should be recorded on any service ticket GridBuddy helps assess refrigerant charge, coil characteristics, total electrical demand, and total cooling capacity. Calculate baseline and incremental operating costs before, during, and after servicing. Send a summary email report of results.

If you are looking for a superheat, subcooling, and airflow app see HVAC Buddy. GridBuddy literally has 10 times the functionality of HVAC Buddy but more complexity. As one reviewer noted this app takes some time to learn and is not for the novice.

Downloading this app ONLY gets you R11 and R12. Up to 95 additional refrigerants and the ability to change entering air wet bulb are available as in-app purchases.

The following are calculated:


Superheat Target Temp


Subcooling Target Temp

Airflow (ETD)

Airflow Target

CFM per Ton

Sensible Heat Ratio

Apparatus Dew Point Temp

Coil Bypass Factor

Condenser Compressor Energy

Condenser Fan Energy

Liquid Saturation Temp

Cooling Tons

Condensing Temp over Ambient

CFM Per Ton

Coil Latent Energy

Coil Sensible Energy

Coil Total BtuH

Evap Enthalpy Delta

Evap Entering Air Mass Flow Rate

Evap Entering Air Enthalpy

Evap Entering Air Specific Volume

Evap Fan Energy

Evap Leaving Air Mass Flow Rate

Evap Leaving Air Enthalpy

Evap Leaving Air Specific Volume

Vapor Saturation Temp

Evaporator Temp Delta

Evap Entering Air Rel Hum

Evap Leaving Air Rel Hum

Unit Total Energy

SEER Annual Cooling Costs


EER Annual Cooling Costs

Focus on what the numbers are indicating and not on trying to remember the chronology of what's been done and calculating values.


During the course of diagnosis, repair, and re-evaluation copy and save as many sets of data as needed. Establish a baseline and annotate each one (i.e. "added 2lbs refrigerant") so you have a trail of actions and results. Select any two of these for your operating report.

Side By Side Compare

The Comparison View shows any two selected sets of measurements side by side complete with every input and calculated value. The comparison shows absolute and percent differences.

Cost Savings

Email an invoice style summary presentation of the data collected on system performance. For maximum value enter the electricity cost per kilowatt hour, annual cooling degree days, and hours per day for your area to get annual cooling costs. Show annual savings by upgrading to a higher SEER by pressing "copy unit" and changing the SEER value on the new unit. Use comparison to show cost savings as a result of servicing (i.e. clean coil, proper charge, etc.).

In App Purchase

All calculations and features in GridBuddy are fully functional for a return air wet bulb temperature of 63 degrees Fahrenheit and refrigerants R-11 and R-12. This means GridBuddy is an excellent training tool to learn pressure temperature relationships, airflow, energy efficiency, and various psychrometric properties of moist air streams.

In-App refrigerant purchases are grouped as follows:

1) All less than R400

2) R400 and greater

3) All refrigerants

Purchasing options one and two are the same as option three which is discounted. Any refrigerant purchase opens up the list of available entering air temperatures.


HVAC GridBuddy is part of the GridBuddy Suite of applications for the HVAC/R industry. If you like GridBuddy Try our other Apps:

HVAC Buddy

HVAC Duct Calc Buddy


HVAC Psychrometric Buddy

What's New in Version 1.1.1

Updated to latest libraries

iPhone Screenshots

HVAC Grid Buddy iPhone Screenshot 1
HVAC Grid Buddy iPhone Screenshot 2
HVAC Grid Buddy iPhone Screenshot 3
HVAC Grid Buddy iPhone Screenshot 4
HVAC Grid Buddy iPhone Screenshot 5

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Customer reviews

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Rated 4/5 based on 3 customer reviews.


5/5 stars

Thank you

One more tool to seperate the professionals from the "rule of thumbers". Makes technical work almost fun. A great tool to help newer technicians grasp the overall concept of the refrigerant cycle. I use it on every service & maitnance call, & my customers seem to be impressed. Keep up the good work.

4/5 stars

For the Professional HVAC Tech

Nice job.
This is for the Pro and not the misinformed/novice tech.
I get all these readings on all jobs and log them into handbase (another dbase) but Grid Buddy does the math for you and you can see the differnce on the screen instead of on paper and looking up charts to concevert WB readings, figures coil bypass or correcting for elevation and so on.
It does it all for you.

This allows me to show the customer what improvements have been made to the system and does it quickly.

This is a good tool for the techs that "want" to do it right but need guidence. Use the readings to see the difference in adjustments.

I checked the math by hand and with other software and found no errors.

I would like to see the option for a report on all the readings or select what you want on the report. Currently the author only has a few options selected and can not be changes for the report for printout, then I can give it a 5 star.

5/5 stars

So far this really helpful at work and in training.

I will be using this app alot more in the near futur.


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