HRAI and AHRI Submitted Code Changes to Further Enable Low-GWP Refrigerants

Following a series of Working Group meetings HRAI, in conjunction with the Air-Conditioning Refrigeration Institute (AHRI) submitted code change requests to the National Research Council of Canada (NRCC) to further enable low-global warming potential refrigerants in Canada. 

As previously noted in the December e-newsletter, the NRCC posted a schedule of meetings related to building and fire codes that impact HRAI members and stakeholders.  

TextDescription automatically generatedWorking groups will reconvene this month to address the Compressed Gas regulations and consider additional code comments that may be required applicable to storage and transportation of low-global warming potential refrigerants in Canada. 

UL Publishes 4th Edition of Standard 60335-2-40 

On December 15, the 4th edition of UL 60335-2-40 was published with important updates for the safe use of new refrigerants for information technology equipment (ITE). The 4th edition includes a new annex - Annex 101.DVN - which will provide equipment design guidance for ITE using A2L refrigerants. In addition to Annex 101.DVN, there are several critical updates to UL 60335-2-40 regarding changes to mitigation based on the latest research. 

A2L Quick Facts 


Q. What is the standard that covers low-GWP refrigerants for chillers? 

A. The equipment standard that would cover A2L use in chillers is CSA/UL 60335-2-40. The 2017 version was updated to include the use of flammables (A2 and A3 refrigerants). The 2019 version added requirements for A2L equipment design using A2L refrigerants. The 2022 version provides information on equipment design requirements. 

Q. Are chillers with A2L refrigerants allowed in Canada? 

A. No. Canada uses CSA B52, which does not yet include flammable refrigerants. 

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