Smart HEPA Air Purifier for Small-to-Medium Rooms. Meet the Windmill Smart Air Purifier, a slimmer, beautifully designed air purifier made for modern homes. Built for small-to-medium rooms, it combines medical-grade HEPA filtration, smart air-quality monitoring, and ultra-quiet performance in a compact design that fits naturally into your space.The 3-in-1 medical-grade HEPA filtration system captures 99.97% of particles down to 0.3 microns, including dust, allergens, smoke, and pet dander, while helping reduce odors and VOCs for cleaner indoor air. A laser-precision air quality sensor continuously monitors PM2.5 levels and automatically adjusts cleaning power when your air needs it. With ultra-quiet operation starting at just 16 dB, the purifier is designed to blend into your home environment: making it ideal for bedrooms, offices, and everyday living spaces. Connect to the Windmill Air app to track your Air Quality Index (AQI), control settings remotely, and schedule purification throughout the day. Features like dual sleep modes, Boost mode, Eco mode, and child lock make it easy to create a calmer, healthier home with minimal effort. Available in four elegant colors, the Windmill Air Purifier delivers powerful HEPA purification in a compact design that looks as good as it performs.