The purpose of this fact sheet is to provide an update on ASHRAE standards for refrigerants and to introduce the new refrigerants that have been awarded an «R» number over the last few years and introduced into the international market.
Updated in April 2026 - English, French, and Spanish
Update on New Refrigerants Designations and Safety Classifications - April 2026
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UN Environment Programme is an Implementing Agency of the Multilateral Fund for the Implementation of the Montreal Protocol. OzonAction is part of UN Environment Programme's Law Division and serves 147 developing countries through the Compliance Assistance Programme.