When a fire breaks out in a high-rise, toxic smoke — not flame — is what claims most lives. The mechanical smoke extraction system is what buys occupants time to escape and gives firefighters a workable path inside. Specifiers naturally focus on the fans themselves: airflow, static pressure, high-temperature ratings. But in our experience as a manufacturer, the component that most often decides whether the system actually works on the worst day of its life is far less glamorous: the fan control cabinet.
A smoke exhaust fan control cabinet is the interface between the fire alarm system and the fan motor. When the fire alarm control panel issues a linkage signal, the cabinet must start the exhaust or pressurization fan immediately and keep it running — regardless of how hostile the electrical environment becomes. A properly built cabinet provides:
If any of these functions fail, a perfectly good fan is just sheet metal on the roof.
For stairwell pressurization fans, corridor exhaust fans and similar single-duty points, our GT-FJ single-speed smoke exhaust fan control equipment offers dedicated one-fan-one-cabinet control. Models GT-FJ-A through GT-FJ-F cover the common motor ratings used in building smoke control, keeping selection simple and spares interchangeable across a project.
Underground garages, podium corridors and large floor plates often require several exhaust fans to act together. Our GT-XFFJ-A5 multi-circuit exhaust and smoke prevention fan control equipment consolidates them into a single cabinet built around circuit breakers and AC contactors: fewer enclosures on the wall, cleaner wiring, one maintenance point, and a lower total installed cost than scattering single cabinets across the floor.
Smoke control never works alone. Two companion products close the loop:
Every cabinet that carries these functions is assembled by hand in our workshop: components mounted on drilled plates, conductors crimped with ferrules, terminals numbered to match the schematic, and relay logic wired circuit by circuit. Before packing, each unit is energized and function-tested — linkage input, contactor sequence, protection trip and feedback signals — because a control cabinet has exactly one chance to prove itself in a fire.
Read more about our inspection routine on the quality control page.
Whether you need one GT-FJ for a stairwell or a multi-circuit GT-XFFJ-A5 for a basement garage, our engineers will size, configure and quote within days. Contact us here or explore the full smoke exhaust series.
