Extremely low profile ultra quiet ventilation fan with high efficiency, capacitor start motor and humidity sensor. ETL Listed, Conforms to UL standard #507, IC Rated up to R40 Insulation, Title 24 Ready, HVI 2100 Certified, Energy Star Approved. ETL list for installation above bath or shower with GFCI protected circuit breaker. Suited for use in bathrooms, spas, laundry rooms and other damp locations.