The AF-960 product page mentions that the duct is "UL2158A listed." This indicates compliance with the UL 2158A standard for clothes dryer transition ducts.

The product page for AF-324 mentions the following standards and certifications: - **ISO 9001**: Quality management system certification. - **UL181**: Factory Made Air Ducts and Air Connectors standard. - **EN 13180**: European standard for ventilation for buildings – ductwork – dimensions and mech

The product page for the AF-603 mentions the standard number UL2158A, indicating that the product is UL listed under this standard.

The AF-800 product page mentions the UL2158A standard number.