Soler & Palau KIT-TD150-DV In-line Exhaust Fan Dual Vent Kit Class I electrical insulation IP 44 Protection Thermal Overload Protection Class B Motor Insulation Sealed for Life Safety tested by Underwriters Laboratories, Inc. and are UL and cUL Listed. ETL Listed Kit: TD150, 2 PG-150, PER-150W, SY-6