Turn any fan into a sensing solution with new Sensaire -sensing technology, which can detect a rapid rise in to turn the fan on. It responds to increases in up to 4x faster than other sensors to help improve air quality. Precise sensitivity adjustment allows variable setting from 20% to 80% relative so the fan works when the homeowner wants it to regardless of climate or season. Continuous ventilation mode allows the fan to operate for set minutes per house to achieve targeted average CFM levels and efficiently meet ASHRAE 62.2 whole house mechanical ventilation (WHMV) requirements. This sensing fan switch offers the flexibility to satisfy local range of adjustment codes, while the decorator style design with settings behind the concealed door blends seamlessly with existing switches. The user adjustable delay shut off times allows run-time customization for different bathrooms within your home, while the LED "on" indicator light and manual operation mode allow for easy use. Can be used to comply with California Title 24 and CALGreen and fits single-gang box; 120 VAC, 60 Hz. This item is backed by a 5 year limited warranty for your convenience. Broan leads the industry with forward-thinking residential ventilation products, customized climate, communications and home automation solutions along with award winning customer service. Broan’s inspiring heritage provides the foundation for its three global brands – Broan, NuTone and BEST.