The commercial wall fan OAC heater provides a burst of heat in areas affected by cold drafts. Designed for residential, commercial and industrial use, the unit can be recessed or surface mounted. Powered by a closed factory lubricated motor, the fan blows warm air downward to create air circulation. 18 ga steel front cover High-limit temperature control with automatic rese 160 cfm fan (single unit - 55 dBA), 2 x 160 cfm fan (double unit - 58 dBA), 3 x 160 cfm fan (triple unit - 61 dBA) Fan delay purges heater of residual heat Durable tubular heating element with fins