The Caleffi magnetic filter is an excellent accessory for proper operation of your boiler. It removes oxides from the water, ensuring the long-term circulation of thermal load. Over time, as water circulates within the system, problems may arise due to corrosion of metal components, leading to the accumulation of black iron oxides. By using the Caleffi magnetic filter, you can keep your boiler in optimal condition, preventing stress on the heating or cooling system.