US Patent 11435109 Ventilator

A ventilator includes a heat exchanger including a plurality of layered partition members, and a housing that has a first end wall part covering one end side of the heat exchanger along a layering direction and a second end wall part covering the other end side of the heat exchanger, and partitions a periphery of the heat exchanger into an exhaust air flow inlet space, an exhaust air flow outlet space, a supply air flow inlet space, and a supply air flow outlet space. An exhaust air flow passes through the exhaust air flow outlet space during heat exchange ventilation, and passes through the supply air flow inlet space during normal ventilation. A supply air flow passes through the supply air flow inlet space during heat exchange ventilation, and passes through the exhaust air flow outlet space during normal ventilation.