HUUM UKU Extension Box is the required interface module for safely operating HUUM electric sauna heaters of 12 kW and above under a UKU control system. Designed for high-powered Hive and other large-capacity models, it offloads the heavy 240 V load through dual 63-amp breaker connections, helping your main control maintain cool, reliable operation. The compact, wall-mounted enclosure measures about 7″ wide by 10″ high, so it fits neatly alongside existing electrical gear while keeping wiring organized and accessible for service. Engineered and assembled in Estonia, this extension box is SGS listed and backed by a 5-year limited warranty, underscoring its safety and durability. Choosing this genuine HUUM UKU extension accessory ensures compliance with manufacturer requirements, supports long-term reliability, and protects your investment in a powerful HUUM sauna heater.
HUUM UKU Extension Box is the required interface module for safely operating HUUM electric sauna heaters of 12 kW and above under a UKU control system. Designed for high-powered Hive and other large-capacity models, it offloads the heavy 240 V load through dual 63-amp breaker connections, helping your main control maintain cool, reliable operation. The compact, wall-mounted enclosure measures about 7″ wide by 10″ high, so it fits neatly alongside existing electrical gear while keeping wiring organized and accessible for service. Engineered and assembled in Estonia, this extension box is SGS listed and backed by a 5-year limited warranty, underscoring its safety and durability. Choosing this genuine HUUM UKU extension accessory ensures compliance with manufacturer requirements, supports long-term reliability, and protects your investment in a powerful HUUM sauna heater.