Built-in thermostat to regulate temperature.;Metal guard to prevent user contact with heating wire.;For ceiling mount only, air ow of 80 CFM (?0%) and 1.3 Sones at 0.1 static pressure.;Power consumption approximately 10.5 Watts with an efficiency rating of approximately 7.6 CFM/Watt.;Heater module equipped with thermal cut o ff and thermal stat.