Changes to Annex LL in UL 60335-2-40:2025 “Ed. 4.1” | White Paper

Updates to Annex LL in UL 60335-2-40 Ed. 4.1 introduce new testing requirements for refrigerant detection systems that may impact HVAC/R product certifications. Complete the form below to download Intertek’s white paper for an overview of the key changes and what they mean for manufacturers preparing for compliance.