HVAC Buddy® Press Temp app for iPhone and iPad

4.2 ( 3872 ratings )

Business Productivity
Developer: Kevin Burandt

5.99 USD

Current version: 3.0.7, last update: 4 years ago
First release : 25 Aug 2009
App size: 42.56 Mb

HVAC PT Buddy contains Pressure Temperature relationships for over 100 refrigerants in both Metric and English units in one degree increments. All refrigerant blends have bubble and dew points on the same line. To better indicate temperature glide R404a, R407c, and R410a show both temperatures for the same pressure on one line. For most of the current common refrigerants you can also view several additional thermodynamic properties enthalpy, entropy, specific heat, etc. Each refrigerant has chemical name, boiling point, critical pressure, critical temperature.

In short, this is the most comprehensive list of refrigerant properties available.

Core Functionality:

• Pressure / temperature relationships
• One degree Increments
• Fahrenheit and Celsius
• Last refrigerant selection recall
• Quick jump to top and bottom of list

Refrigerants:

R-11, R-12, R-13, R-13b1, R-21, R-22, R-23, R-32, R-113, R-114, R-115, R-116, R-123, R-124, R-125, R-134a, R-E134, R-141b, R-142b, R-143a, R-152a, R-170, R-E170, R-218, R-227ea, R-236ea, R-236fa, R-245ca, R-245cb, R-245fa, R-E245fa1, R-C270, R-290, R-C318, R-400-(50/50), R-400-(60/40), R-401A, R-401B, R-401C, R-402A, R-402B, R-403A, R-403B, R-404a, R-406A, R-407A, R-407B, R-407c, R-407D, R-408A, R-409A, R-410a, R-410B, R-411A, R-411B, R-412A, R-413A, R-414A, R-414B, R-415A, R-416A, R-417A, R-420A, R-421A, R-422A, R-422B, R-422C, R-422D, R-500, R-501, R-502, R-503, R-504, R-507a, R-507, R-508B, R-509A, R-600, R-600a, R-601, R-601a, R-717, R-718, R-744, R-1150, R-1270, FR-12, FX-220, FX-40, G2018c, GHG-HP, GHG-X5, HX4, NARM-12, NARM-22

Additional expanded thermodynamic properties are available at each pressure / temperature combination for the following refrigerants:

R12, R22, R23, R32, R123, R124, R125, R134a, R143a, R152a, R170, R245fa, R290, R404a, R407c, R410a, R507a, R600, R600a, R717, R718, R744, R1150, and R1270

Metric and Imperial expanded thermodynamic properties include:

• Bubble and Dew temp
• Pressure (psia / MPa)
• Density of Liquid
• Volume of Vapor
• Enthalpy of Liquid and Vapor
• Entropy of Liquid and Vapor
• Specific Heat of Liquid and Vapor

These properties are available by tapping on the pressure temperature row.

Notes on Refrigerant Blends:

• Bubble and dew points combined on one line for all blends
• R404a, R407c, and R410a key on pressure to better indicate temperature glide

Additional information:

• Chemical Name
• Formula
• Ozone depletion potential (ODP)
• global warming potential (GWP)
• molecular mass
• boiling point
• critical pressure
• critical temperature

Roughly a fourth of the refrigerants have additional information including color code, lubricants, etc.

About:
HVAC PT Buddy is part of the HVACBuddy Suite of applications for the HVAC/R industry. We strive to make each app the best in class solution for its purpose. You can be confident the app you buy today will continue to be updated and improved.

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Pros and cons of HVAC Buddy® Press Temp app for iPhone and iPad

HVAC Buddy® Press Temp app good for

Love this use it daily, could you please update to include some new refrigerants. R-438b is not on the list I would like it if it was.

Now I have my pressure conversion charts with me at all times plus it easier to read than the field charts and at 4.99 it is much cheaper buying a decicated digital pressure temperature chart.

Very nice app! Very handy because it breaks down pressures into 1 psig increments.

I agree with the other reviewer its the only program that has 1 psi increments.

Sweet app. As a commercial HVACR technician/engineer I will be using this on a daily basis. Very well done.

Could we please get and update (or maybe a different chart) for those of us above 5000 ft. all my charts read different than these.

Some bad moments

I was hoping for the best with this six dollar app, but when I used it for the first time I have already discovered a flaw. R-717 has its pressures listed as psi and inches mercury for vacuum, but the temperatures are wrong. You have to convert the pressures listed to inches mercury, the temperatures shown are for psi (- means negative psi) I hope this isnt the same problem for all of the refrigerants, but Im just not sure how trustworthy this app is anymore.

I checked R-408a against 3 separate printed references. 2 to 3 degrees off every time. Im glad I checked my references before I decided that my subcooling was off. If you buy this app make sure you have a PT chart handy. Better yet, dont buy the app and glue your PT chart to your iPhone. Problem solved!

Both 409a and 416a are off by several degrees. This isnt horseshoes or hand grenades, its refrigeration and must be accurate or its worthless! This app has potential but must be corrected to be useful and trusted in the field.

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