HUUM STEEL Electric Sauna Heater

About this HUUM Electric Sauna Heater 

*stones & controller to be purchased separately*

(We recommend purchasing 10 x 15kg boxes of the 3-5cm Rounded Olivine Diabase Sauna Stones with this electric heater. You can find the recommended sauna stones here). 

The HUUM STEEL is a slim electric sauna heater with remarkably small safety distances. It is a perfect heater choice for home saunas that have limited space. The well-optimized structure of STEEL enables a 5-10 cm safety distance to combustible materials. The HUUM STEEL fits up to 150kg of sauna stones.

STEEL is also available in a wall-mountable model, which is suitable for even smaller saunas. 

Controller: Depending on the controlling system you will opt for, the heater can be purchased either with the UKU Local (an easy-to use controller without Wi-Fi or mobile functionality), or the UKU Wi-Fi Controller (a remote-control option with Wi-Fi capabilities).  

Safety Distances: See the wider image bank of this heater for a diagram about this heater's safety distances:

6kW: A= 50 mm & B= 420 mm

9kW: A= 100  mm & B= 520 mm 

10.5kW: A= 100 mm & B= 520 mm

 *SUFFICIENT AMOUNT OF STONES TO BE PURCHASED SEPARATELY 

5 Key Features of the HUUM STEEL Electric Sauna Heater

• Small safety distances
• Internal air duct in the center speeds up heating by 25%
• High stone capacity 
• Stainless Steel
• 5-year guarantee

Product Specification

This heater must be installed by a qualified electrician. The STEEL heater can be installed on both single-phase 240VAC and three-phase 400VAC power supplies. 

Please refer to the "HUUM Electric Sauna Heaters - Single Phase Connection" in the "Downloadable Files" tab if installing the electric heater on a single-phase power supply. 

Please ask your electrician to take photos when installing the heater for the first time in the unlikely case there are any issues with the heater further down the line. We will ask for these to diagnose the issue as best as possible.

About HUUM

HUUM is the leading manufacturer when it comes to unique designs and technology. HUUM has been awarded for their innovative and stylish sauna products. In 2015, the DROP sauna heater won the Red Dot Award for Product Design. The inspiration for the HUUM products come from nature. Combined with age-old sauna knowledge, smart technology and modern Nordic design, the HUUM heaters are a stylish and robust choice for any sauna. The amount of stones in HUUM heaters are optimized for the perfect, soft steam experience. The innovative HUUM heaters are easy to use and have all been UK CA- certified.  

If you want to learn more about our HUUM heaters and explore more options, click on the following link: Our HUUM sauna heater collection.

HUUM UKU Controllers 

The HUUM STEEL can be purchased either with the UKU Local or the UKU Wi-Fi. Below are the features of the controller options.  

UKU Local: 

• For heaters up to 18kW 
• Connectable to lights/ventilation and steamer 
• Overheating protection  
• Timer 
• Child safety lock  
• Available in a number of different colours, including black, white, wooden surrounds

UKU Wi-Fi:

• For heaters up to 18 kW 
• Remote control via mobile app; Android / iOS 
• Connectable to lights 
• Unlimited users 
• Door magnet 
• Overheating protection 
• Timer 
• Child safety lock 
• Available in Black Glass or Mirror (Gold upon request too)

Warranty Information

For full details on product warranty, see HUUM's Limited Warranty Terms and Conditions. The heating elements are not included in the warranty.

Christmas and New Year's Delivery Notice

Please note the following changes to our pallet shipping and DPD delivery service on parcel orders over the Christmas period.

Our warehouse is fully closed for operation over the following days: Wednesday 24 December, Thursday 25 December, Friday 26 December, Wednesday 31 December and Thursday 1 January.

Orders requiring a pallet

The last dispatch date for orders requiring a pallet is Friday 19th December 2025. Pallet orders dispatched on this day must be booked and signed for with one of our sales team representatives latest by close of business on Friday 19th December 2025.

Please note:

• Pallets dispatched on 19th December will be delivered on either 22nd or 23rd December, depending on your postcode
• We strongly advise against booking deliveries to the Highlands or Channel Islands close to the 19th December, as these may be held at the hub over the festive period
• There may be limited availability for pallet shipping on this day and we cannot guarantee that available slots remain

We will commence our regular pallet shipping service on Monday 5th January 2026.

If you have any questions about your pallet order, please get in touch with our Sales team: +44 (0) 20 8050 2895 or email info@finnmarksauna.com

Small Parcel Orders

DPD will deliver as normal up to and including Tuesday 23rd December 2025. Orders for next day delivery must be placed latest by 3pm.

Limited dispatch service: We will dispatch DPD orders on Monday 29th December and Tuesday 30th December only during the festive closure period.

We will commence our regular delivery service on Monday 5th January 2026.

*Estimated delivery times are applicable to the UK mainland only (excludes Highlands and Islands). Additional delays and charges will be required for Non-UK Mainland and Highlands and Islands deliveries.