The Elta 018-CH250‑6 – 3TP is a circular electric heater designed for 250mm duct systems, offering a powerful 6 kW heating capacity on a three-phase power supply. Constructed with a sturdy Aluzinc coated steel casing, this heater ensures durability and long service life. It incorporates two protection thermostats for overheating safety and screw terminals that allow for straightforward electrical connections. The temperature can be easily adjusted via a built-in potentiometer. Safety and efficiency are enhanced by a differential pressure switch that monitors airflow, a sensor for minimum air velocity detection, and a supply air temperature sensor, ensuring optimal heating performance with secure operation.