Opteon™ FAQs

1. What is an HFO?
HFO is an acronym for “Hydro-Fluoro-Olefin”. Like HFCs, the three main chemicals that make up an HFO are Hydrogen, Fluorine, and Carbon. HFOs have very low global warming potential (GWP) and zero ozone depletion potential (ODP).


2. What are the GWPs of the Opteon™ Low GWP Stationary Refrigerants?
The following GWP values are based on The IPCC Fifth Assessment Reports.

Opteon Product GWP values

3. Will current leak detection systems be able to detect Opteon™ products?
Yes, many of the leak detection system provided by OEMs are in the process of adding the Opteon™ products to their refrigerant libraries. For leak detection systems that do not have the Opteon™ products as a selection, it is recommended to set your system to detect R-134a.


4. Is XP40 (R-449A) a drop in replacement for R-404A?
Chemours has published detailed retrofit guidelines for converting R-404A systems, which are available at Opteon.com.

In general, when converting from R-404A to XP40 (R-449A) equipment and oil changes are not required. However, filter driers should be replaced and TXVs may need to be adjusted or replaced if non-adjustable.

In all cases, it is recommended that superheat settings be checked and adjusted as necessary after conversion.


5. What kind of energy efficiency improvement can I expect by retrofitting to XP40 (R-449A)?
The observed energy efficiency increases when retrofitting a R-404A system to XP40 (R-449A) have been up to 12% for Medium Temperature racks and up to 5% for Low Temperature racks.


6. If you top off the XP40 (R-449A) or XP10 (R-513A) multiple times, will this impact its A1 non-flammable rating?
No. As part of the ASHRAE Standard 34 listing process for an A1 rating, the refrigerant blend undergoes rigorous fractionation testing, including multiple leak recharge scenarios in order to assure that the blend will always maintain a non-flammable A1 rating.