4 wire detector mounted in HVAC units actively samples air for HVAC duct smoke from fire.

Benefits:
-3 year equipment warranty
-Excellent for retrofit/ non-proprietary
-Rugged
-Smallest duct detector on market
-Wide temperature range
-Easy installation
-Single controller for dual detectors

Uses:
Any Size Commercial Building, Schools, Museums, Factories, Warehouses, Stadiums, Plants, Airports, Hospitals, Theaters, Shopping Malls, Prisons, Military Bases, Offices, Etc.