The Airetrak is the ONLY control approved by Panasonic for use with their fans . Optimize your ventilation system with the Airetrak™ microprocessor based control system. It is engineered to give ventilation system designers and installers the versatility required to balance ventilation with energy conservation while maintaining indoor air quality. It is ideal for use with any ventilation system where specific ventilation rates are required. The Airetrak is often used to control a bathroom fan employed as a whole house ventilation system. It will quietly cycle the fan on and off, at preset times, throughout the day and or night. Easy Installation Energy Efficient Automatic Built In "Real-Time" Timer Front Panel, Full Speed Override Fits In Single Gang Work Box UL/CSA Listed Maximum Amperage Rating: 1.85 Amps 1 Year Warranty/Made in the USA On site programming takes less than two minutes. Installation is a snap. The Airetrak fits into a single gang electrical box and utilizes a standard cover plate. Once installed, the Airetrak automatically controls the fan speed and cycle time, while allowing the occupant access to a full speed boost cycle. The battery circuit ensures proper system operation, even after a power failure. Air Flow: Rate is adjustable from 40% to 100% of fan capacity. The installer can select from 16 different settings based on home size, occupancy and other field conditions. Built-in Timer: Programmed on installation to operate the ventilation equipment in 5 minute increments (5,10,15, etc.) during a 12 or 24 hour cycle. Boost Feature: To activate the boost feature, simply press the BOOST button and the fan will operate at full speed for 20 minutes then automatically return to its programmed cycle. Simple timer mode: The system can be set to a "0" programmed cycle operation, at which point it becomes a silent, 20 minute timer.