Heat exchanger The heat exchanger is made of copper tube with a standard connection on the left side. The 2-pipe system is equipped with 1 spiral and the 4-pipe system is equipped with 2 spirals. The spirals can be used up to a maximum of 15 Bar. The coils are suitable for hot water (boiler). solar systems, chillers, heat pumps and water systems with glycol and low temperature systems. Fan: The fan is directly linked to an electric motor that is protected against overheating. Air filter: The air filters are easy to remove for cleaning. Electrical requirements: The units are only supplied with a cable for motor connection as standard. The control panel and processor are not included in the system. Advantages of Fan-Coils: Fast heating Available in floor/wall and ceiling model Can provide cooling when used with heat pump/chiller. Can be provided with air purification (allergies and asthma, etc.)