Panasonic designs ventilation ceiling exhaust fans that not only produce maximum airflow, but also remove air impurities while operating at whisper-quiet audio levels. Panasonic FV-0510VS1 WhisperValue DC bathroom fan is the perfect multifamily solution; also ideal for single family and manufactured homes. The revolutionary ECM motor with intelligent self-adjusting SmartFlow technology senses the amount of resistance in the duct run and automatically adjusts the fan speed to deliver the optimal CFM output, even in the case of a complicated duct run. The built-in Pick-A-Flow airflow selector provides the unique ability to select your required airflow (50-80-100 CFM) with the simple flip of a switch. The extremely thin profile of WhisperValue DC fan opens up options for where you can install the fan, which is UL listed for ceiling or wall mount. Panasonic fans use less energy to move larger volumes of air than other brands. Consequently, Panasonic fans run cooler so they last longer because they are less likely to overheat and result in motor failure. The unique L-shaped bracket simplifies installation and provides strong support. The L bracket is interchangeable to be positioned to either the left or right side stud for optimal fan placement. Panasonic ventilation fans are ENERGY STAR certified and provide better efficiency and comfort with less noise. The fans feature high-performance motors and an improved blade design, providing better performance and a longer life. Achieve quality air and energy efficiency with whisper-quiet sound levels for your spaces with Panasonic FV-0510VS1 WhisperValue DC Fan.