# Ammonia Absorption — HVAC refrigerant replacements: retrofit compatibility, safety class, GWP and lubricant

For Ammonia Absorption, retrofit / new is N; ashrae safety class is B2; gwp is 0; listing status / notes is Acceptable, verified against its source on 2026-08-11.

- **Refrigerant:** Ammonia Absorption _(verified: appears in the quote below)_
- **Retrofit / new:** N _(verified: appears in the quote below)_
- **ASHRAE safety class:** B2 _(verified: appears in the quote below)_
- **GWP:** 0 _(verified: appears in the quote below)_
- **Listing status / notes:** Acceptable _(verified: appears in the quote below)_

## What the source says

> Ammonia Absorption | | N | 0 | 0 | B2 | <https://www.govinfo.gov/app/details/FR-1996-09-05/96-22649> September 5, 1996 | Acceptable |

## Source

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

Last verified: 2026-08-11. Review by: 2027-08-11.
Part of [HVAC refrigerant replacements: retrofit compatibility, safety class, GWP and lubricant](https://referencesource.org/hvac-component-refrigerant-compatibility/).