Refrigerant R-453A — component and lubricant compatibility
What is the ashrae safety class for Refrigerant R-453A — component and lubricant compatibility?
For Refrigerant R-453A, ashrae safety class is A1, verified against its source on 2026-08-11.
ASHRAE 34-2024 categorizes HFO-1234yf and R-444A as being in the A2L Safety Group and R-453A, R-456A, and R-480A in the A1 Safety Group.
— federalregister.gov, retrieved 2026-08-11
- Refrigerant
- R-453A verified
- ASHRAE safety class
- A1 verified
- Retrofit / new
- retrofit also on this page
- Listing status / notes
- acceptable, subject to use conditions also on this page
The same source also states
List the blend R-453A as acceptable, subject to use conditions, in retrofit MVACs on buses and trains; and
— federalregister.gov, retrieved 2026-08-11
Source
- federalregister.govhttps://www.federalregister.gov/documents/2025/11/10/2025-19812/protection-of-stratospheric-ozone-listing-of-substitutes-under-the-significant-new-alternatives