R-424A

For R-424A, trade name(s) is RS-44; retrofit / new is R/N; ashrae safety class is A1; gwp is 2,440; listing status / notes is Acceptable, verified against its source on 2026-08-11.

Refrigerant: R-424A verified
Trade name(s): RS-44 verified
Retrofit / new: R/N verified
ASHRAE safety class: A1 verified
GWP: 2,440 verified
Listing status / notes: Acceptable verified

Sourceepa.gov

Verified2026-08-11

Review by2027-08-11

DatasetHVAC refrigerant replacements: retrofit compatibility, safety class, GWP and lubricant

What the source says

R-424A | RS-44 | R/N | 0 | 2,440 | A1 | <https://www.govinfo.gov/content/pkg/FR-2006-09-28/pdf/E6-15833.pdf> September 28, 2006 (pdf) (183 KB) | Acceptable |

— epa.gov, retrieved 2026-08-11

Source

epa.govhttps://epa.gov/snap/substitutes-residential-and-light-commercial-air-conditioning-and-heat-pumps

Last verified against source: 2026-08-11. Due for re-check by 2027-08-11. This page as Markdown · OKF bundle · full dataset as JSON.