A vertical air-to-air exchanger is a new type of ventilation and exhaust equipment. It discharges polluted indoor air while also introducing fresh outdoor air into the room. Unlike other air purification devices, the air-to-air exchanger is part of an open-loop system, providing fresh, filtered outdoor air to the indoor space. With sufficient air volume, people can breathe high-quality, fresh, and clean air indoors, which is rich in oxygen and beneficial to human health.