Low-GWP Tool

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Compare climate-friendly and compatible refrigerants for retrofitting 

Low-GWP Tool is now part of the new Ref Tools app, our essential, all-in-one mobile app for air conditioning and refrigeration technicians. Ref Tools gives you access to the tools, guidance, support, and information you need—on the job and in the field.   
Download Ref Tools to access the latest version of Low-GWP Tool.  
Not on mobile? Click here to try the browser version of Ref Tools. 

About Low-GWP Tool

A global trend toward sustainable refrigeration means many refrigeration and air conditioning systems must undergo a refrigerant replacement process. Retrofitting refrigeration systems to more climate-friendly refrigerants is much easier with the right tools in hand—and the first one you should reach for is Low-GWP Tool.  

Low-GWP Tool ensures compatibility with the TXV and uses a simple calculation to show the indicative capacity difference of a retrofit refrigerant. Simply enter basic information like TXV type, current refrigerant, operating range, and retrofit refrigerant, and Low-GWP Tool will verify that your refrigerant choice is efficient, environmentally friendly, and compatible. 


Danfoss Low-GWP tool

Try the web version

Low-GWP Tool is also available in the web browser version of Ref Tools. 


Conditions for usage of Low-GWP tool

The calculations performed by Low-GWP tool should be regarded only as estimations of the altered performance of the refrigeration system. It is generally not recommended to use drop-in or retrofit refrigerants in systems with variable evaporating temperatures. 

When using drop-in or retrofit refrigerants you must always check, and in most cases readjust, your super heat settings.

  • Recommendation is based on the thermostatic expansion valves suitability with the retrofit refrigerant versus the old refrigerant
  • Superheat adjustment is a guide to maintain a dry return to the compressor
  • The smileys indicate the thermostatic expansion valves suitability at the different evaporating temperature ranges and have no reference to the possible capacity difference
  • Capacity shows the increase or decrease in capacity of the thermostatic expansion valve using the retrofit refrigerant versus the old refrigerant
  • Capacity changes can be managed by changing the orifice in cases where the capacity difference is very large

Contact us

If you need support or have suggestions for how to improve Low-GWP Tool, please send us an email at coolapp@danfoss.com


Low-GWP Tool ("the Application") is provided on an "as is" and "as available" basis for the intended purposes as determined by Danfoss only and any use hereof is at the user's sole risk. The Application and results and information generated thereby cannot substitute technical advice but must be verified by the user, they are not promises and should not be relied on as accurate data or analyses.

Danfoss disclaims all warranties and conditions regarding the Application, whether express, implied, or statutory, including, but not limited to, conditions of merchantability, satisfactory quality, fitness for a particular purpose, accuracy and non-infringement of third parties' rights. Danfoss does not warrant that the Application will meet your requirements or that the operation hereof will be uninterrupted or error-free.

To the extent not prohibited by law, in no event shall Danfoss be liable for any direct, special, indirect or consequential damages, whatsoever, including, without limitation, damage to property, damages for loss of savings or profits, or loss of data arising out of any use of the Application.