The EnduraDrive incorporates permanent-magnet, direct-drive technology in which the fan motor is directly coupled to the fan, eliminating the need for intermediary moving parts like gears or belts. The design is specifically engineered so that the motor, variable-frequency drive (VFD) and cooling tower work together. The fan system is designed to reduce the risk of failures due to moisture ingress. Features include upgraded insulation, a double O-ring, a drive-end seal and an integrated drain. The application-specific VFD has firmware designed and tested to optimize system reliability. The cooling system is engineered and CTI certified for extreme duty and to withstand thermal and vibration rigors of cooling tower operation.