| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchange ventilation fan preventing lift of a shutter without increasing the number of components.SOLUTION: In a state in which an air supply inlet 40a and an air discharge outlet 40b are closed, a first shutter 41 covers an air discharge outlet 40b and a portion of an air supply inlet 40a in a side of the air discharge outlet 40b, and presses an outer periphery of a front face of a second shutter 42 in a side of the air discharge outlet 40b, while the second shutter 42 is positioned closer to a back face of a ventilation fan body 10 than the first shutter 41, and covers the remaining portion of the air supply inlet 40a. |
