The NEMA 4-rated InnovairFlex watertight duct smoke detectors by System Sensor of St. Charles, Ill., are designed to operate in the most challenging conditions. The detectors can operate in airflow speeds from 100 to 4,000 feet per minute, temperatures from -4° F to 158° F and humidity ranges from 0 to 95 percent (noncondensing).
A watertight, UV-resistant housing provides protection against falling dirt, rain, windblown dust, splashing and hose-directed water. InnovairFlex watertight models are compatible with all InnovairFlex accessories.