HUUM UKU Extension Box for Heaters over 12kW

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 3-year limited warranty, and the precise power management necessary to protect high-performance sauna heating investments.

Key Features

• Required for High-Powered Heaters – Essential for HUUM electric sauna heaters 12 kW and above, ensuring safe operation, compliance with safety standards, and reliable performance in demanding high-capacity installations.
• Seamless UKU Integration – Expands the UKU control system to manage larger heaters efficiently, maintaining precise temperature control and consistent sauna performance without overloading the main unit.
• Durable, Compact Design – Wall-mounted with a sleek light grey finish, this extension box saves space, keeps wiring organized, and integrates aesthetically into the sauna environment for both function and appearance.
• Engineered in Estonia – Built to strict quality standards and SGS listed for safety compliance, the unit is backed by a 3-year limited warranty, providing long-term reliability and peace of mind for your investment.