System Sensor - D4120W Weatherproof Smoke Detector VETO click the Build-Out circle below

click the Build-Out circle below and visit the Tech-MCT Blackout Build-out page

J801V120DM5SEAA

air conditioners and forced air systems according to the logic of the original board

Plastic fan blade included

Bin Thermostat

System Sensor - D4120W Weatherproof Smoke Detector VETO click the Build-Out circle belowThe InnovairFlex D4120W watertight 4 wire photoelectric duct smoke detector is UL listed as a watertight enclosure providing protection against falling dirt, rain, windblown dust, splashing and hose directed water. D4120W duct smoke detector features a pivoting housing that fits various applications: both square and rectangular footprints mount to round or rectangular ductwork.