This range of products improves indoor air quality by purifying outdoor air through filters with high dust collecting capacity during airing. In order to mitigate the effects of worsening PM2.5 in China, Panasonic developed ventilation products with a top-class purifying capacity with PM2.5 removal rate of 98%. The PM2.5 sensor in the products measures a condition of air release, air supply, and air circulation. Amid growing attention to air quality in response to an environmental policy in China, the sensor enables customers to easily see indoor and outdoor air environment by showing the condition on the liquid-crystal display. Additionally, the products are designed for low noise not to disturb a living environment.