The Fire-Lite® D365PLF ADDRESSABLE DUCT SMOKE DETECTOR features a pivoting housing that fits both square and rectangular footprints and mounts to round or rectangular ductwork. This unit senses smoke in the most challenging conditions—airflow speeds of 100–4000 feet per minute, temperatures of –4°F to 158°F, and humidity of 0%–95% (non-condensing). The updated remote-test-capable detector head now meets the new ANSI/UL 268 standards.