STI EF181610-W3 NEMA 3R Filter Fan Window

Overview

The STI EF181610-W3 is a NEMA 3R-rated fiberglass filter fan window assembly designed to mount on access control enclosures and equipment housings in outdoor or harsh indoor environments. This window unit manages thermal buildup in cabinets housing HID lighting ballasts, high-voltage capacitors, and controller electronics operating across wide temperature extremes — especially critical in climates ranging from –40°C to +90°C without requiring sealed, conditioned space.

NEMA 3R rating means the enclosure withstands rain, sleet, and external icing without water ingress that would damage internal electronics. The integrated filter fan removes convective heat load while the aluminum and fiberglass construction resists corrosion in coastal, industrial, and temperature-cycling environments where standard sheet-metal cabinets degrade.

Compatibility

The EF181610-W3 is engineered for STI access control panel housings and OEM enclosures that accept modular window-mounted fan assemblies. Verify your enclosure accepts a window-mount (vs. side-panel-mount) filter fan with standard 50–60 Hz AC power supply. Retrofit compatibility depends on enclosure bore dimensions and ventilation ducting; confirm with the access control cabinet manufacturer or integrator during cabinet specification phase.

Installation Notes

Mount the window assembly to the enclosure cabinet per STI installation instructions, ensuring gasket and seal alignment to maintain NEMA 3R integrity. The unit operates on standard 50–60 Hz AC supply; confirm adequate branch-circuit capacity and power routing to the fan motor before cabinet final assembly. Operating temperature range (–40°C to +90°C) applies to ambient conditions outside the enclosure; internal temperature management depends on cabinet seal quality and ductwork design. No tools beyond a screwdriver and torque wrench (per STI specs) are required for mounting.