The Helios EHR‑R 9/400 TR is a high-quality electric duct heater featuring a closed tubular heating element made from stainless steel, designed for a low surface temperature to ensure safe operation. Housed in a galvanised sheet steel duct casing with an integrated terminal box, this model is engineered for installation in commercially available duct systems.
Equipped with both an automatically resettable temperature limiter (triggering at 50 °C) and a manually resettable temperature limiter (triggering at 120 °C), it provides enhanced safety and reliable temperature control. This makes the EHR‑R 9/400 TR a practical and efficient solution for maintaining consistent air temperature in ventilation and air conditioning systems.