System Sensor D4120W Innovair Watertight HVAC Duct Smoke Detector 4-Wire NEW U.S. Shipping ONLY!!! PLEASE ASK ALL QUESTIONS BEFORE BIDDING ON THIS ITEM!!!
Fenwal DH-2000 smart duct detector. Fully functional (tested) Comes with detector and tube (approx 5', but can be cut down to reduce shipping cost). All duct detectors use EMT, and 10-12 holes spaced for width of duct.
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