What recovery equipment for R-134a refrigerant must meet that standards set by what?

Recovery equipment for R-134a refrigerant must meet the standards set by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) and the Environmental Protection Agency (EPA). Specifically, it must comply with EPA regulations regarding refrigerant recovery to ensure safe and efficient recovery processes. Additionally, recovery units should be certified to meet the Underwriters Laboratories (UL) safety standards for electrical equipment. Properly certified equipment helps minimize environmental impacts and ensures compliance with legal requirements.