Reintroducing WhisperGreen® Select™, our whole house IAQ solution with enhancements that will provide greater value to our customers. First, our improved single-hinged Flex-Z Fast™ bracket for more flexible, fast and easy installation. Other enhancements include a new elegant grille design, an environmentally friendly 26 ga Zinc-Aluminum-Magnesium (ZAM) housing design and dual access junction box that helps simplify wiring in tight spaces. Panasonic WhisperGreen® Select™ Ventilation Fan, Multi-Speed, 50/80/110 cfm Flow Rate, 4 in Diameter Duct, 120 VAC, 0.1 A Current/Amps, 60 Hz Frequency, 9.9 W Wattage Consumption, 0.3 sones, 13 in Grille Length, 13 in Grille Width, Polypropylene Grille, 10-1/4 in Housing Length, 10-1/4 in Housing Width, 7-3/8 in Housing Height, Zinc Aluminum Magnesium Housing Material, Ceiling Mounting, No Humidity Sensing, No Motion Sensing, Domestic/Import: Import