The Elta 018-RH100/50 – 42-3TP is a rectangular electric duct heater engineered for efficient and safe air heating, featuring a robust 1000mm x 500mm build and delivering 42kW of heating power on a 3‑phase supply. Its casing is made from corrosion-resistant Aluzinc-coated steel for enhanced durability. For safety, the unit incorporates two protective thermostats, while electrical connections are simplified using screw terminals. A built-in potentiometer allows for precise temperature adjustments. To ensure proper airflow, a differential pressure switch is included, along with a sensor that monitors minimum air velocity. A supply air temperature sensor is also fitted to maintain consistent and safe operation.