The Filter Fan Plus series encompasses air-flap technology on the air outlet side to allow a high degree of airflow. Two systems are available. The more commonly known FPI system’s filter fan is located in the lower part of the enclosure. It draws cleaner, cooler air into the enclosure (airflow direction "in"). This system consists of a filter fan and exhaust filter. The FPO system’s filter fan is located in the upper area of the enclosure to draw warmer air out of the enclosure (airflow direction "out"). The FPO system consists of an intake filter and exhaust filter fan.
