The UKU Extension Box for UKU Control System is a HUUM power relay module required for the safe operation of electric heaters rated at 12kW and above within a UKU control system. It suits HUUM electric sauna heaters of 12 kW and above, including the HUUM Hive.
Rated at 240 V with dual 63-amp breaker connections, the box takes on the heavy electrical load so the controls run cool and reliably. The compact wall-mounted enclosure measures 7" × 4" × 10", weighs 3.25 lbs and has a light grey finish. Engineered and assembled in Estonia, it is SGS listed and carries a 3-Year Limited Warranty.