System Sensor D4120 Detector R-410A including common Heil models such

including common Heil models such as the G4P042A3D1 and PGA042D2LA

reducing field assembly time for technicians

Check for a dirty HVAC air filter

it is compatible with certain Raypak and Rheem heat pump models

System Sensor D4120 Detector R-410A including common Heil models suchThe System Sensor D4120 is an industrial grade 4 wire photoelectric duct smoke detector designed for high performance smoke detection in HVAC air handling systems. This InnovairFlex duct smoke detector operates across a wide air velocity range of 100 to 4,000 feet per minute, making it suitable for both low flow and high volume applications. It features a versatile pivoting housing that accommodates square or rectangular footprints and mounts easily