Fire-Lite W-H355 SWIFT Intelligent Wireless Heat Detector (135°), Includes B501W Base and CR-123A Batteries

Protect critical spaces with faster, more dependable heat detection. The Fire-Lite Alarms by Honeywell W-H355 SWIFT Intelligent Wireless Heat Detector is an addressable heat detector engineered for commercial fire security and monitoring applications. Using state-of-the-art thermistor sensing, the W-H355 provides a factory preset 135°F fixed-temperature alarm for rapid detection of developing fires; the W-H355R option adds 15°F/min rate-of-rise detection for early response to fast-developing heat events. Built for modern security and surveillance networks, the detector joins a robust 902–928 MHz SWIFT mesh wireless network—communicating to the W-GATE gateway and integrating with Fire-Lite FACPs such as the MS-9200UDLS and MS-9600(UD)LS. Each unit ships with a B501W base and CR-123A batteries for immediate commissioning and reduced on-site labor. Addressable reporting, repeater-capable devices, and reliable battery operation make this detector ideal for retrofit and new-build projects where uptime, centralized monitoring, and streamlined installation matter. Order the W-H355 to strengthen your facility’s fire detection strategy or contact us for system design and integration support.

• Fast, reliable fire detection using thermistor sensing for quicker alarm response and improved occupant safety
• Wireless SWIFT mesh connectivity simplifies installation and expands coverage with repeater-capable devices
• Factory preset 135°F fixed-temperature detection (W-H355) with optional 15°F/min rate-of-rise on W-H355R for versatile protection
• Includes B501W mounting base and CR-123A batteries for immediate deployment and reduced installation time
• Addressable compatibility with Fire-Lite panels (MS-9200UDLS, MS-9600(UD)LS) for centralized monitoring and easy integration into existing security systems