Ideally, Panasonic will utilize SmartExhaust paired with Whisper series single speed fans as a quality alternative for Green Building, multifamily, weatherization and renovation projects that require continuous ventilation rates. Smart Exhaust is also a solution for existing ENERGY STAR-qualified fans that require control. The SmartExhaust comes from the same people who brought you the AirCycler line of ventilation controllers. The SmartExhaust is a simple, smart, flexible and economical solution to meet exhaust ventilation requirements. The SmartExhaust is designed to replace the bathroom fan and light switch. By using a microprocessor to monitor and control fan operation, a precise amount of ventilation can be provided. There are only two settings on the SmartExhaust switch: VENTILATION and DELAY. You can set the number of minutes per hour that you want the fan to run with the VENTILATION setting. You can set the number of minutes that you want the fan to run after the bathroom light has been turned off with the DELAY setting. The DELAY setting provides additional run time for the fan to complete ventilating the bathroom after use.