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HUUM UKU Extension Box Extension Box for HUUM Heaters Over 12kW
HUUM UKU Extension Box Extension Box for HUUM Heaters Over 12kW
HUUM UKU Extension Box Extension Box for HUUM Heaters Over 12kW
HUUM

HUUM UKU Extension Box Extension Box for HUUM Heaters Over 12kW

Sale price$773.00
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HUUM UKU Extension Box Extension Box for HUUM Heaters Over 12kW
HUUM UKU Extension Box Extension Box for HUUM Heaters Over 12kW Sale price$773.00
Specifications
Model UKU Ext Box
Voltage 240V
Circuit Breaker Amperage 2 × 63A
Weight 3.25 lbs
Width 7" (178 mm)
Depth 4" (101 mm)
Height 10" (254 mm)
Mounting Style Wall-mounted
Listing SGS Listed
Warranty 3-Year Residential / 1-Year Commercial
Description

The HUUM UKU Extension Box is an essential component for anyone using a HUUM sauna heater over 12kW. Designed to work seamlessly with HUUM UKU control systems, this extension unit increases switching capacity and ensures safe, stable operation for larger, higher-output heaters.

Engineered and built in Estonia with HUUM’s signature minimalist Scandinavian styling, the UKU Ext Box is compact, durable, and easy to mount. If you’re running a 12kW+ HUUM heater—such as HIVE, HIVE Mini, or CLIFF/STEEL high-output models—this extension box is required to complete your installation.

Features

  • Required for all HUUM electric heaters over 12kW

  • Fully compatible with all HUUM UKU controls (sold separately)

  • Provides additional switching capacity for large-format heaters

  • Clean, minimalist light grey housing

  • Wall-mounted installation

  • SGS listed for safety and performance

  • Designed, engineered, and manufactured in Estonia

What’s Included

  • HUUM UKU Extension Box

  • Installation & Operation Manual

  • 3-Year Residential / 1-Year Commercial Warranty

Required for Operation

This unit is required when using:

  • HUUM Sauna Heaters Over 12kW

  • Must be paired with a HUUM UKU Control System (sold separately)

Documentation

Manual Links:

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Specifications
Model UKU Ext Box
Voltage 240V
Circuit Breaker Amperage 2 × 63A
Weight 3.25 lbs
Width 7" (178 mm)
Depth 4" (101 mm)
Height 10" (254 mm)
Mounting Style Wall-mounted
Listing SGS Listed
Warranty 3-Year Residential / 1-Year Commercial
Description

The HUUM UKU Extension Box is an essential component for anyone using a HUUM sauna heater over 12kW. Designed to work seamlessly with HUUM UKU control systems, this extension unit increases switching capacity and ensures safe, stable operation for larger, higher-output heaters.

Engineered and built in Estonia with HUUM’s signature minimalist Scandinavian styling, the UKU Ext Box is compact, durable, and easy to mount. If you’re running a 12kW+ HUUM heater—such as HIVE, HIVE Mini, or CLIFF/STEEL high-output models—this extension box is required to complete your installation.

Features

  • Required for all HUUM electric heaters over 12kW

  • Fully compatible with all HUUM UKU controls (sold separately)

  • Provides additional switching capacity for large-format heaters

  • Clean, minimalist light grey housing

  • Wall-mounted installation

  • SGS listed for safety and performance

  • Designed, engineered, and manufactured in Estonia

What’s Included

  • HUUM UKU Extension Box

  • Installation & Operation Manual

  • 3-Year Residential / 1-Year Commercial Warranty

Required for Operation

This unit is required when using:

  • HUUM Sauna Heaters Over 12kW

  • Must be paired with a HUUM UKU Control System (sold separately)

Documentation

Manual Links: