The HUUM UKU CLASSIC 4.2 Wi-Fi Sauna Controller makes sauna heating very easy and comfortable. With UKU you can heat your sauna on the spot or do it from your phone through HUUM mobile app.

With this control system, you can easily adjust the heating time, temperature, and other sauna settings from your mobile phone. The control panel is also available in different colors, so you can choose one that best matches your sauna’s interior design. 

Designed for both convenience and safety, the UKU 4.2 Wi-Fi can control the sauna lighting, ventilation, and steamer from a single system. Built-in overheating protection and a child safety lock provide added peace of mind, while the sleep intuitive control panel ensures straightforward operation for every sauna session.

The UKU 4.2 offers a smarter, safer, and more precise way to control the sauna. One of the most notable updates is the inclusion of two sensors: a safety sensor (previously referred to as the temperature sensor) and a new bench sensor.

• Safety Sensor – Helps keep the temperature near the sauna heater under control.
• New Bench Sensor – Measures both temperature and humidity at bench level, where sauna users experience the heat. While installation is optional, it provides more precise readings and an enhanced sauna experience.
• Simplified Cabling – The updated set includes a long, heat-resistant cable that can be used for the control panel, sensors, and door contact sensor.
• Upgraded Door Sensor Kit – Provides greater installation flexibility and improved long-term reliability.

UKU sauna control system has won the most prestigious Red Dot product design award for its functionality and design in 2021.

• Easy to Use
• CE Certificate
• Safety and Control
• Made in Estonia

UKU sauna control panel works with HUUM Sauna Heaters over 11kW and up to 18kW but can be used with other manufacturers' heaters. A UKU Extension Box is required for heaters over 10.5kW and up to 18kW.

For help choosing the ideal sauna controller for your electric heater, see this guide: How to Choose a Sauna Controller for an Electric Sauna Heater

Features

• Smart sauna control system
• Control from the wall-mounted control panel and mobile phone
• Minimalist interface with user-friendly menu
• Settable on/off, time, temperature, and delayed start function
• For heaters up to 18kW (over 11kW requires an extension box)
• Temperature range of 104–230°F (40–110°C)
• Displays set temperature and room temperature
• Safety sensor helps regulate temperature near the heater
• Bench sensor measures temperature and humidity at bench level
• Connects to lights, ventilation, and a steamer
• Overheat protection and child safety lock provide enhanced sauna safety
• Designed, engineered, and made in Estonia
• Limited 3-year residential warranty and limited 1-year commercial warranty

Specifications

Min/Max Temperature Range
104–230°F (40–110°C)

Dimensions
White/Black Control Display Panel: 4.13"L x 2.17"W x 0.87"D
Wood Control Display Panel: 4.25"L x 2.25"W x 1"D
Main Control Module: 5.59"L x 3.54"W x 2.28"D

Supply Voltage
40A, 240V 2~

Heating Time
1, 3, 6, 12, 18 hours

What's Included 

• Control display panel
  
• Main control module
• Safety sensor
• Bench sensor
• Sensor housings (2)
• Door sensor kit
  
• Temperature resistant cable
  
• Installation and operation manual
• 3-year limited residential warranty and 1-year limited commercial warranty

Add-Ons

• UKU Extension Box (required for heaters over 10.5kW)
• Sauna Gear 300 Waterproof Box (required for outdoor installations)

Manuals & Resources