The Elta 018-RH80/50 – 18-3TP is a rectangular electric heater built for ducted ventilation systems, featuring an 800mm x 500mm casing and delivering 18kW of heating power through a 3‑phase electrical supply. Constructed from Aluzinc-coated steel, the unit offers excellent corrosion resistance and long-term durability. It comes with two safety thermostats to protect against overheating and is equipped with screw terminals for quick and secure wiring. A potentiometer enables precise temperature control, while a differential pressure switch monitors airflow conditions. Additionally, it includes a sensor to detect minimum air velocity and a supply air temperature sensor to support safe and efficient operation.