Instant mobile refrigerant charge calculator for HVACR applications.

The HVAC Check & Charge™ mobile app from Emerson Climate Technologies provides an on-site refrigerant charge calculator for air conditioning applications. Based on historic sliding cardboard charge calculators, this app allows contractors to easily calculate the ​correct system refrigerant charge for R-22, R-410A, R-32, R-407C, R-134a, R-452B, R-454B, and R-438A. Contractors can simply choose Subcooling, Superheat, or Airflow and enter the specified system temperatures along with the latent and sensible environmental loads. These values are then used to determine the proper system charge and whether the charge amount needs to be altered based on these conditions.

• Superheat Calculator (non TXV)
• Subcooling Calculator (TXV)
• Airflow Calculator
• For use with R-22, R-410A, R-32, R-407C, R-134a, R-452B, R-454B, and R-438A
• Imperial and Metric Support

Assists with calculating proper system refrigerant charge based on operating conditions.

Information on this and other Emerson Climate applications is available at

What’s New

Version 2.6.0

- New Refrigerant! R-438A is available for purchase.
Feedback always welcome:

Ratings and Reviews

4.8 out of 5
3.1K Ratings

3.1K Ratings

Chicken Liver 88 ,

5 stars

App works and runs great! Really nice way to show and educate customers about correct refrigerant charge via the graph. This app is a must for running early spring maintenances and make sure you’ve got the perfect charge in a system.

Haha free tokens ,

On the fence about the user agreement

Not sure about the app I'm not open to the idea of having my clients information emails and phone contacts and addresses collected from your device by another company which is what the user agreement says you need to agree to those terms to use the app. Possible I miss read it but still I'm not taking that chance

Developer Response ,

Thank you for the feedback. We have made many updates to the application. Please update and let us know if you have any issues -

maintmax ,

Maintenance plus

Check in charge of app has been very helpful over the years.


Emerson Climate Technologies, Inc.
45.7 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Portuguese, Spanish

Age Rating
Rated 4+
© Emerson Climate Technologies Inc.
In-App Purchases
  1. Purchase R-407C $0.99
  2. Purchase R-134a $0.99
  3. Purchase R-438A $0.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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