Qmark BMS-compatible through an optional relay Contemporary bar-stock grille designed to provide optimized airflow Manual reset thermal overheat protector disconnects power in the event of accidental blockage Built in tamper-resistant thermostat All units have a permanently lubricated and enclosed fan motor, which creates long life, low maintenance, and gently distributes warmth throughout the area Automatic fan delay eliminates cold drafts on start-up and discharges residual heat from the heater body during shut down Power on/off switch for added safety during maintenance *