Duct smoke detectors are required by NFPA 90A in air handling systems to prevent smoke from being circulated through a building via the HVAC system. For facilities running Simplex fire alarm systems, two part numbers come up most often: the 4098-9687 and the 4098-9756. These are not interchangeable — they serve different roles in the… Read more »
Edwards EST SIGA modules are the backbone of Edwards addressable fire alarm systems. Whether you are troubleshooting a module fault, replacing a failed unit, or expanding an existing system, understanding the differences between the SIGA-CT1, SIGA-CT2, and SIGA-CR is essential. This guide covers each Edwards EST SIGA module in detail, including use cases, wiring considerations,… Read more »
Fire alarm control panel batteries are one of the most overlooked maintenance items in building fire safety — until they fail. A dead or degraded battery can cause panel trouble conditions, failed inspection tests, or worse, a system that does not function during a power outage. This guide covers everything facilities managers and fire alarm… Read more »
The Notifier FSP-951 smoke detector is one of the most widely requested replacements for Notifier addressable fire alarm systems. Whether you are upgrading from the FSP-851 or replacing a failed unit in an existing Notifier installation, this guide covers everything you need to know: specifications, base compatibility, panel compatibility, and ordering considerations. FSP-951 Overview and… Read more »
Siemens fire alarm systems — including legacy Cerberus Pyrotronics equipment — are installed in hospitals, universities, airports, and commercial buildings across North America. These systems are built to last, which is precisely why facilities managers and fire alarm technicians often find themselves sourcing Siemens fire alarm replacement parts for panels that are 15, 20, or… Read more »
Manual pull stations are required life safety devices in virtually every commercial, institutional, and multi-family building — but they’re also vulnerable to accidental activation, vandalism, and tampering. The STI Stopper II pull station cover is the industry-standard solution for protecting pull stations while maintaining accessibility and code compliance. Whether you’re protecting a pull station in… Read more »
Construction and renovation projects in occupied or protected buildings create a common and costly problem: false fire alarms triggered by dust, debris, and airborne particulates activating smoke detectors. The solution is simple — smoke detector dust covers — but many contractors and facilities managers underestimate when and how to use them properly. This guide covers… Read more »
Duct smoke detectors are a critical but often overlooked component of a building’s fire protection system. Required by NFPA 90A in most commercial HVAC installations, duct detectors monitor the air moving through supply and return ducts — and shut down air handling units when smoke is detected, preventing the HVAC system from distributing smoke throughout… Read more »
The Gamewell-FCI XP95 addressable detector range is one of the most widely used addressable detection platforms in North American commercial fire alarm systems. Originally developed by Apollo Fire Detectors and sold through Gamewell-FCI (now part of Carrier/UTC Fire & Security), XP95 devices are found in schools, healthcare facilities, hotels, and office buildings across the country…. Read more »
VESDA (Very Early Smoke Detection Apparatus) systems represent the gold standard in aspirating smoke detection for mission-critical environments. Unlike spot-type detectors that wait for smoke to reach them, VESDA systems actively sample air through a network of pipes, detecting minute concentrations of combustion products before a fire fully develops. Keeping these systems performing at peak… Read more »
