R-125/R-134a/R-600a (28.1/70.0/1.9)

For R-125/R-134a/R-600a (28.1/70.0/1.9), trade name(s) is NU-22 old composition; retrofit / new is R/N; ashrae safety class is A1; gwp is 1,990; listing status / notes is Acceptable, verified against its source on 2026-08-11.

Refrigerant: R-125/R-134a/R-600a (28.1/70.0/1.9) verified
Trade name(s): NU-22 old composition verified
Retrofit / new: R/N verified
ASHRAE safety class: A1 verified
GWP: 1,990 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-134a/R-600a (28.1/70.0/1.9) | NU-22 old composition | R/N | 0 | 1,990 | A1 | <https://www.govinfo.gov/content/pkg/FR-2010-06-16/pdf/2010-14510.pdf> June 16, 2010 (pdf) (229 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.