The Duct Air Heater 21kW 500mm Three Phase provides efficient heating for commercial ventilation systems requiring high output. It features supply and extract fan outputs and combined temperature and airflow sensors for accurate performance.
Equipped with solid-state switching, this heater avoids mechanical switching failures, while control status indicators simplify monitoring. Safety is ensured through a high-temperature limit with manual reset, and separate supply and extract outputs allow reliable operation for duct heaters over 150mm diameter, making it ideal for demanding commercial environments.