VENTILATION FAN FOR SIMULTANEOUSLY PERFORMING AIR SUPPLY AND AIR DISCHARGE

摘要

A heat exchanger (9) is provided upstream of an air supplying fan (7b). An air discharging fan (7a) and the air supplying fan (7b) are arranged so as to respectively face those surfaces of the heat exchanger (9) which are perpendicular to each other. A circuit board (10) is mounted at a position which is in an outer casing (1) and at a corner diagonally opposite the heat exchanger (9).