Heavy 18 ga welded steel cabinet with powder coated finish and control compartment housing a master terminal board with a hinged and latched access door, simplifying wiring, installation maintenanceCopper clad steel sheath element with continuously brazed steel fins formed to allow side draw through air flowAll units come equipped with automatic reset type limit controls to de-energize the heater should an over temperature situation occurTotally enclosed, 1-speed, 1-phase, permanently lubricated, thermally protected motors with unit bearings on 3 to 20 kW modelsAll motors mounted with rubber insulators to minimize vibration and noiseFan over-ride purges unit of residual heat at shutdownLouvers are individually adjustable for directional control of air flow up to 15 deg from straight horizontalUnit heaters can be mounted for horizontal or vertical discharge