STI EP181611-T3 NEMA 3R Polycarbonate Enclosure with Filter Fan

Overview

The EP181611-T3 is a polycarbonate EnviroArmour® enclosure designed to house access control panels, fire alarm control units, or remote annunciators in outdoor or semi-protected environments. The tinted, removable polycarbonate door with draw-down latch provides vandalism resistance and environmental protection against dirt, dust, and moisture. NEMA 3R rating means the unit withstands rain and sleet without water entering the enclosure — critical for panel installations exposed to weather or washdown. The integrated filter fan operates at 44dB(A), providing active thermal management without excessive noise that would trigger complaints in occupied spaces.

Compatibility

This enclosure accommodates standard 07-door access control panel layouts and fire alarm control panels requiring remote mounting with environmental protection. Compatible with any electronic control unit (annunciator, timer, relay module) that fits within the internal mounting space and draws power from standard AC 120/240V supply. The brass threaded inserts support generic inner panel mounting — no proprietary quick-connects required.

Installation Notes

Unit ships ready to wall-mount via provided mounting panels. Removable hinged door with lockable draw-down latch allows technician access without tools. UV-resistant polycarbonate withstands extended outdoor exposure without degradation. Filter fan operates on standard AC power with thermostat control option for temperature-triggered activation — essential in climates with thermal cycling. Soft rounded edges reduce snag hazard during installation and service. The 3-year manufacturer warranty covers polycarbonate breakage under normal use (1-year coverage on electromechanical and electronic components).