The HUUM UKU Extension Box is a specialized, SGS-listed power relay module required for the safe operation of electric heaters rated at 12kW and above within a UKU control system. Engineered and assembled in Estonia, this model is the ideal solution for high-powered HUUM Hive and other large-capacity heaters, utilizing dual 63-amp breaker connections to offload heavy 240V electrical loads and ensure cool, reliable control operation. Featuring a compact 7″ by 10″ wall-mounted enclosure, the Extension Box integrates seamlessly with existing electrical gear to maintain organized wiring and long-term serviceability. This genuine HUUM accessory is the industry-standard requirement for high-output installations, providing manufacturer-compliant safety, robust durability backed by a 5-year limited warranty, and the precise power management necessary to protect high-performance sauna heating investments.
The HUUM UKU Extension Box is a specialized, SGS-listed power relay module required for the safe operation of electric heaters rated at 12kW and above within a UKU control system. Engineered and assembled in Estonia, this model is the ideal solution for high-powered HUUM Hive and other large-capacity heaters, utilizing dual 63-amp breaker connections to offload heavy 240V electrical loads and ensure cool, reliable control operation. Featuring a compact 7″ by 10″ wall-mounted enclosure, the Extension Box integrates seamlessly with existing electrical gear to maintain organized wiring and long-term serviceability. This genuine HUUM accessory is the industry-standard requirement for high-output installations, providing manufacturer-compliant safety, robust durability backed by a 5-year limited warranty, and the precise power management necessary to protect high-performance sauna heating investments.