R-125/R-290/R-134a/R-600a (55.0/1.0/42.5/1.5)

For R-125/R-290/R-134a/R-600a (55.0/1.0/42.5/1.5), trade name(s) is ICOR AT-22; retrofit / new is R/N; ashrae safety class is A1; gwp is 2,530; listing status / notes is Acceptable, verified against its source on 2026-08-11.

Refrigerant: R-125/R-290/R-134a/R-600a (55.0/1.0/42.5/1.5) verified
Trade name(s): ICOR AT-22 verified
Retrofit / new: R/N verified
ASHRAE safety class: A1 verified
GWP: 2,530 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-125/R-290/R-134a/R-600a (55.0/1.0/42.5/1.5) | ICOR AT-22 | R/N | 0 | 2,530 | A1 | <https://www.govinfo.gov/content/pkg/FR-2006-03-29/pdf/06-3030.pdf> March 29, 2006 (pdf) (181 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.