HUUM
UKU Sauna Heater Extension Box for 12 kW and Above
UKU Sauna Heater Extension Box for 12 kW and Above
Couldn't load pickup availability
Authorized Dealer - Trusted partnership with top brands
Fast Shipping - Reliable carriers, safe delivery
Responsive Customer Support - (437) 837-1618
DESCRIPTION
The HUUM UKU Extension Box is designed for use with UKU control systems and is required for all HUUM sauna heaters over 12kW. It expands the control system’s capacity, enabling safe and efficient operation of higher-output heaters.
Built with a clean, compact design, the extension box is wall-mounted and integrates seamlessly with HUUM control setups. Engineered in Estonia, it delivers reliable performance while maintaining the modern aesthetic HUUM is known for.
FEATURES
For use with UKU controls
Required for HUUM sauna heaters over 12kW
Wall-mounted design
Light grey finish
Designed, engineered, and made in Estonia
SGS listed
INCLUDES
Extension box
Installation and operation manual
SPECIFICATIONS
Model UKU Ext Box
Voltage 240V
Circuit Breaker Amperage 2 x 63
Weight 3.25 lbs
Width 7" (178 mm)
Depth 4" (101 mm)
Height 10" (254 mm)
INSTALLATION
Refer to the installation manual for setup instructions.
Why Buy From Us
Personalized Expert Support
You get real guidance from someone who understands the products — not generic retail staff. We help you choose the right option based on your needs, space, and budget.
Faster, Direct Customer Service
Big retailers make you wait on hold or talk to multiple departments. We respond quickly and directly — before, during, and after your purchase.
Reliable Post-Purchase Support
We don't disappear after you buy. We're here for setup help, troubleshooting, warranty questions, replacements, and anything you need long-term.
Direct Manufacturer Relationships
We work closely with our suppliers, which means better warranties, smoother replacements, and faster solutions if anything comes up.
Safer, More Careful Shipping
Our products are shipped through carriers who know how to handle specialized or large items, reducing the risk of damage and delays.
We Actually Care About Your Experience
Your purchase genuinely matters to us. We treat every order with personal attention and take full ownership of your experience from start to finish.