The Washington State Building Code Council has voted to fully adopt ASHRAE 15-2019 and the 3rd edition of UL 60335-2-40. Adoption of these codes will allow the use of mildly flammable A2L refrigerants in refrigeration and air-conditioning including the use in occupied dwellings. Washington is the first state to bypass the model code organizations to directly adopt the updated ASHRAE and UL standards to allow the use of A2L refrigerants.
With this code adoption, the use of A2L refrigerants can begin on July 1, 2020, however market availability of equipment designed to use A2L refrigerants is not expected for several years. This code adoption will allow manufacturers to begin testing equipment in various conditions for use in a few years.
Washington is one of several states pushing forward with adoption of state level HFC phase downs, however none of the proposed changes by Washington state would require the use of HFC refrigerants. HARDI is tracking state level changes, and a full list of state level changes is available on our HFC Phase-down webpage.
HARDI is working to see the adoption of ASHRAE 15 and UL 60335-2-40 through the model code process for the 2024 model code. States typically adopt the model codes developed by the International Code Council and IAPMO after they are published. This is a step necessary in our efforts to have a national phase down of HFC refrigerants. Recently Senator Kennedy (R-LA) introduced the AIM Act to phase down the use of HFCs on the national level. You can contact your Senator and urge them to cosponsor the AIM Act here.
For more information contact Alex Ayers at firstname.lastname@example.org.