The Delonghi 5515110251 Portable Air Conditioner with a specialized limescale filter, designed to enhance the air quality in your living space. This innovative portable air conditioner not only cools your room effectively but also ensures that the air you breathe is free from harmful particles. The limescale filter efficiently captures and eliminates impurities, providing you with clean and fresh air. Say goodbye to worries about limescale buildup affecting your air conditioner's performance. With the Delonghi 5515110251, you can enjoy a cool and healthy environment without the hassle of dealing with limescale issues.