When the outdoor air is fresh, opening windows for ventilation is indeed the best option. However, the acceleration of urbanization has led to haze pollution and significant automobile exhaust emissions. In summer, when the air conditioner is on, families often keep all the windows closed, leading to a lack of fresh air. In winter, the outdoor temperature is low, and frequent ventilation can lead to catching a cold.
There are always many factors that limit the frequency of opening windows. The fresh air system allows you to keep your windows closed 24 hours a day while still maintaining filtered, high-oxygen indoor air.
Additionally, studies have found that the ventilation effect of the fresh air system, based on the positive pressure principle, is very uniform. It ensures consistent ventilation in every corner of the room, leaving no unventilated areas. As long as the fresh air system is designed reasonably, with a high enough ventilation rate and air volume, the entire room can be effectively ventilated.