The AIRDOCTOR 3500 Air Purifier is a powerful and efficient machine designed for large rooms up to 1274 sq. ft. It features a True HEPA filtration technology to effectively remove airborne particles and improve indoor air quality. With four different speeds and a glossy white finish, this electrically powered air purifier is perfect for any room in your home, providing quiet operation and a filter replacement indicator for added convenience. Weighing 18 lbs and made of durable plastic, it is a reliable choice for maintaining a clean and healthy environment in your home.