Duct heaters are used for air conditioning systems, heat recovery systems and ventilation systems as well as in process plants with a need for heating specific gases. Standard designs maximum air/gas temperature +70ºC. Standard electrical heater intended for mounting in ducts connection with air conditioning system, heat recovery systems and ventilation systems. The duct part is made of hot-galvanized steel while the terminal box is embedded in the duct part and has IP22 density.