The Helios Fans KWL-EM eC is a compact extension module designed for the control of external post-heating elements in Helios KWL ventilation systems. It enables precise temperature management by integrating seamlessly into the system’s heating control process. Housed in a robust casing with dimensions of 210 x 210 x 100 mm, the module offers reliable operation in residential, commercial, and industrial environments. This accessory is essential for extending heating functionality and maintaining a comfortable indoor climate in systems requiring additional thermal regulation