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HUUM DROP 15" x 13" x 23" 9kW 240V Brushed Stainless Steel Compact Wall-Mounted Hardwired Electric Sauna Heater

HUUM DROP 15" x 13" x 23" 9kW 240V Brushed Stainless Steel Compact Wall-Mounted Hardwired Electric Sauna Heater

Regular price $1,366.00
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Embedding Flange

Stainless Steel Embedding Embedding Flange for DROP Sauna Heaters

Safety Rail

Wood Safety Rail for DROP Sauna Heaters


Small 2" - 4" 33lbs Gray Rounded Olivine Granite Sauna Heater Stones
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The DROP 9 kW electric sauna heater from HUUM is inspired by the purest element in nature – a drop of water. Its handsome and artistic rounded design compliments and softens the angular interior of a classic sauna, creating a more elegant appearance. But DROP isn’t only about the looks. This compact wall-mounted heater has an impressive 122-pound stone capacity, exceeding most wood-burning stoves, which guarantees a soft, consistent high heat and long-lasting steam.

Elegant sauna heaters in the heart of your sauna

Forget about boxy-looking heaters. HUUM heaters minimalist and round design lets the beauty of the stones show and adds a touch of elegance to your sauna.

Enjoy a mild steam like in a traditional sauna. Thanks to their high stone capacity, HUUM heaters provide a mild and long-lasting steam.

Heat your sauna from your phone. With HUUM app it takes just a couple of clicks on your phone and your sauna will be hot and ready when you get home.

Invest in quality. Each of the heaters is made of stainless steel and receives a lot of special care to look its best and last you a really long time.

Award-winning design

The organic and minimalist design of DROP heater makes it the statement piece of your sauna. Plus, it takes up very little space and fits a lot of stones to keep the sauna hot for long.

Made with care in Estonia

HUUM heaters are made of stainless steel and go through a long and carefully supervised production process to guarantee the best quality of each product.

Easy To use

Soft Steam

Longer Relaxation

Stainless Steel

CE Certification

Safety & control

Steam like in a traditional sauna

HUUM heaters are built by using very small amounts of metal so that the heat comes mainly from the stones and only very little from the metal. This way we can maximize the good negative ions from the stones, like in traditional saunas, and keep the positive ions from the metal at a minimum. Together with a high stone capacity this is our secret to healthy, mild and long-lasting steam.

Sauna Room

Wall materials and insulating the sauna room

In a sauna with electric heating, all massive heat accumulating wall surfaces (brick, glass brick, rendering etc.) must be insulated to use the electric heater with a regular output.

What's Included

  • 9kW Sauna heater
  • Wall-mount bracket
  • Heat reflector
  • Installation and operation manual

Not Included

  • UKU Control (Sold Separately)
  • 122 lbs stones (Qty 4 x 33 lbs. 5-10cm stones boxes) (Sold Separately)


  • Unique water-drop design
  • 240V/1PH operation
  • For sauna rooms from 290 to 530 cu.ft.
  • Works with UKU controls (sold separately)
  • 122 pound stone capacity (required 4 boxes sold separately)
  • Direct contact between stones and heating elements
  • More exposed stones create a longer and milder heat
  • Stainless steel construction
  • Stainless steel, industrial quality heating elements​
  • Wall-mounted design
  • Designed, engineered, and crafted in Estonia
  • SGS listed for Safety
  • Wi-Fi Connectivity (with UKU Wi-Fi, Glass or Mirror)



Sauna room

8-15 m³

Stone capacity

55 kg (121.25 lbs)

Stone Size 5-10 cm (1.97"-3.94")


12 kg (26.5 lbs)


590 mm (23.3")


390 mm (15.4")


335 mm (13.2")

Watts 9000
Volts 240
Amps 37.5
Phase 1 PH
Room Volume 290 - 530 CU. FT.
Rock Capacity 122 lbs
Construction Material Stainless steel
Certifications & Listings CE, SGS, IPX4
Mountable Inside Sauna Room? Yes
Hardwired? Yes
Maximum Temperature Settings 110 C
Installation Type Wall-Mount
High-Temperature Limit Location Sensor
Electrical Pipe Fitting  For power cable
Fuel Type / Power Options YES



16 A

Circuit Breaker (A) 3 × 10

Supply voltage 3-phase

400 V 3N


5 x 2,5 (N x mm²)

In the case of a 230 1N connection, an analogous connection is made to the 3-phase. The heating circuits must be done before the circuit breaker.

Safety Distance


150 mm (5.90")


690 mm (27.16")


485 mm (19.09")

D 220 mm (8.66")
E 310 mm (12.20")
Min Gap 1200 mm (47.24")
Supplier Lead Time 40 days
Sell Package Qty & Uom 1; EA
Ship Type Parcel
Freight Class 70

    NB! It is forbidden to use a non-heat-resistant cable with PVC isolation as the power cable. The joint box must be waterproof and it must be located up to 50 cm (19.69") from the floor.

    Positioning the heater


    Buyer is obligated to read user manual and follow instructions and requirements presented. Damage to the product caused by not following instructions and requirements will void warranty.

    If any defects are found on the product, where manufacturer can be blamed, then buyer has the right to demand fixing or replacing the product. Demands must be made not later than 5 years after buying the product. Purchase receipt needs to be presented when warranty demands are made.

    Warranty Terms


    • Warranty applies only to electric heaters that have been used according to the manual.
    • NB! Warranty does not cover heating elements. They are considered as consumable parts.
    • Warranty does not cover wear that occurs from natural usage.
    • Warranty does not cover defects or wear caused by planned use.
    • Warranty does not imply when:
      • damage or defects are caused by transportation or other actions not controlled by manufacturer;
      • product has been damaged by carelessness or overload;
      • product has not been installed correctly;
      • product has been modified in any way;
      • warranty period is over;
      • product is not complete.
    Warranty Terms For Huum Equipment


    • The warranty only applies to the product that has been installed and used in accordance with the manual.
    • NB! The warranty does not apply to heating elements. They are considered as consumable parts.
    • The warranty does not cover normal wear or improper use of the product.
    • The warranty period is 5 years from the date of purchase (based on the purchase receipt).
    • The warranty does not apply to defects caused by:
      • damage or defects due to transport and or other actions not controlled by manufacturer;
      • defects caused by carelessness, improper storage or overloading the product;
      • errors in the installation of the product due to noncompliance with the product’s manual, operating instructions or safety requirements;
      • modifying the product in any way (parts added, removed or replaced);
      • product incompleteness;
      • using together with products that are not compatible with this device;
      • when the product warranty period has expired.



    About HUUM

    The team consists of enthusiastic sauna fans who believe in the importance of sauna for health and well-being. All of them grew up in Estonia where it would be hard to imagine not going to the sauna at the end of a busy working week, after a cold winter day or on a nice summer evening in the countryside. Sauna means taking time for yourself, regenerating your body and mind, staying healthy and just feeling good. That is why we think that sauna should be available to everybody and everywhere.

    Story of HUUM

    3 generations of sauna traditions

     The founder of HUUM, Siim Nellis, is actually the third one in his family to produce sauna heaters. His grandfather was a skilled oven-builder with a lot of experience in building sauna stoves and his father is also active in sauna heater production. Siim continues to carry on these traditions, connecting the Estonian sauna building knowledge with modern design and innovative technology.

    How the first design sauna heater was born

     Sauna heaters have been developed in countries with long sauna traditions without necessarily paying much attention to design. In the search for a more contemporary and efficient design for sauna heaters Siim Nellis turned to the Estonian Academy of Arts in 2011. The product design students of the academy proposed different designs, among which one design stood out. It was inspired by a water drop and had a hemispheric shape. In 2012 the heater was developed for production and it became known as DROP. Unlike other sauna heaters before, DROP had a unique round shape, well-optimized use of metal and an increased stone capacity, which allowed the electric heater to produce a mild steam similar to wood-burning sauna stoves.

    In 2015 DROP sauna heater won the prestigious Red Dot Award: Product Design, one of the most important international awards for exceptionally good design. DROP sauna heater was acknowledged for a well-implemented design solution.

    Encouraging active and healthy lifestyle


    HUUM encourages active and healthy lifestyle by sponsoring sports and being active ourselves. They sponsor HUUM IRONMAN triathlon team which consists of young talented athletes. Another team sponsored by them is the Estonian women’s indoor hockey team Sparta who won the Estonian championship in 2018. Their own staff is currently active in disc golf, with their proudest moment being winning the first place in the Estonian enterprises disc golf tournament in April 2019.


    Take a peek into our production process and discover how our sauna heaters and remote controls are made.


    HUUM products are made entirely in Estonia

     HUUM heaters, control units and other products are made entirely in Estonia with the help of different partners. Did you know that the seemingly simple design of our heaters actually requires a quite complex production process? That is why we have partnered up with Estonia’s leading metal work companies to guarantee the best possible quality in each step of the production. Most of the raw materials used in the production, such as stainless steel and electronic components, are imported.

    The making of HUUM heaters requires a lot of manual work

     Since we got a little creative with our heaters, it isn’t really possible to produce them in fully automated process lines. Getting all the metal rods into the right length, the right thickness and bent in the right shape means a lot of manual work for the metal workers. Our heaters are made of stainless steel and go through shot blasting and acid treatment in order to get their final refined appearance.

    Remote controls that are smart on the inside and beautiful on the outside

     The innovative electronic solutions of HUUM remote controls and app are the creation of some of the bright minds of our hometown Tartu. It took five years to develop and improve the technology that we currently use. Oshino Electronics Estonia takes care of the production of the remote controls, which come in wooden and different colored plastic cases. The wooden cases are handmade out of thermo-treated ash, giving each one a unique look.

    Less packaging is more

     We use as little packaging material as possible to reduce unnecessary waste and use recycled materials for our products where possible. For example, the case of the main module of the control unit is made of recycled plastic.


    Estonian Union of Interior Designers Award 2014: People’s choice

    Product design award Bruno 2014:Readers choice

    Golden Egg 2014: Visual identity bronze egg

    Estonian Design Awards 2014: Honorable mention

    Options & Accessories

    UKU Local Sauna Controller


    UKU Local sauna controller makes sauna heating easy and comfortable. UKU comes with several safety and extra features for a pleasant sauna experience. It can be used with different manufacturers’ heaters.

    Color Available:

    • Black (SKU: UKU-LOCAL-BLACK)
    • Blue (SKU: UKU-LOCAL-BLUE)
    • Grey (SKU: UKU-LOCAL-GREY)
    • Sand (SKU: UKU-LOCAL-SAND)
    • White (SKU: UKU-LOCAL-WHITE)
    • Wood (SKU: UKU-LOCAL-WOOD)

    UKU Wi-Fi Sauna Controller

    UKU 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. In order to use the mobile app solution, UKU needs to be connected to a Wi-Fi network. UKU comes with several safety and extra features for a pleasant sauna experience. It can be used with different manufacturers’ heaters.

    Color Available:

    • Black (SKU: UKU-WIFI-BLACK)
    • Blue (SKU: UKU-WIFI-BLUE)
    • Grey (SKU: UKU-WIFI-GREY)
    • Sand (SKU: UKU-WIFI-SAND)
    • White (SKU: UKU-WIFI-WHITE)
    • Wood (SKU: UKU-WIFI-WOOD)
    • Glass (SKU: UKU-WIFI-GLASS)
    • Mirror (SKU: UKU-WIFI-MIRROR

    Safety Rail for DROP Series Sauna Heaters


    Safety railing for DROP heater helps to protect you from accidentally touching against the hot heater. The safety railing consists of light-colored wooden arcs and stainless steel supports to attach them to the heater. Not only does the railing provide extra safety – but it is also a nice way to style your heater.

    • Color / Finish: Wood / Stainless Steel
    • Weight: 3 lbs
    • Dimensions: 23"L x 9"W x 3"H

    Small Sauna Heater Stones


    33 lbs of 2" - 4" (5-10 cm) of rounded olivine sauna stones. We highly recommend using rounded stones in HUUM heaters to compliment the design and have milder steam. The stones are durable and have high heat capacity.

    • SKU: STONES-SM-33
    • Weight: 33.95 lbs
    • Dimensions: 15"L x 11"W x 4"H 

    Embedding Flange for DROP Series Sauna Heaters


    The HUUM Flange D embedding flange is useful when you are planning to install your DROP stove partly inside the sauna bench. It is made of stainless steel and it covers up the wooden edges around the stove, leaving the final result looking refined and smooth.

    • Dimensions: 15" Radius) x 2" Depth 

    1500 W Element for DROP Heater


    Heating element for DROP 4.5 kW and DROP 9 kW heaters

    • SKU: DROP-EL15
    • Weights: 1.2 lbs
    • Dimensions: 9" L x 14" W

    2000 W Element for DROP Heater


    Heating element for DROP 6 kW and DROP 9 kW heaters

    • SKU: DROP-EL20
    • Weights: 1.3 lbs
    • Dimensions: 9" L x 14" W

    Frequently Asked Questions

    5. Mobile app connectivity
    How to use mobile app


    With HUUM mobile app you can heat your sauna comfortably from wherever you are. You can choose the beginning and end time of the heating, set the desired temperature and check the sauna temperature in real-time. HUUM mobile app works with UKU Wi-Fi and UKU GSM controllers.

    • Download HUUM mobile app on your phone (or open HUUM web application)
    • Sign up
      Fill in the required fields and create an account.
    • Insert sauna ID and sauna code
      You can find the ID number and the code number on the cover of the main module. UKU Wi-Fi will connect to the mobile app instantly if it is already connected to a Wi-Fi network. UKU GSM controller will establish a mobile data connection in 30 minutes.
    • Select heating time and temperature
      The app allows you to set the desired temperature and the beginning and end time of the heating.
    • Your sauna is heating
      You can check the sauna temperature in real-time from the app. A notification will let you know when the sauna is ready.
    • Keep your app updated
      Make sure to update your app regularly so that it can function well. We recommend switching on automatic updates.
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    • What an excellent company and excellent products. Just like the old days when companies really cared about their customers, these guys are awesome!!!

      Betty C.

      Warminster, Pennsylvania

    • I was greeting in chat soon after logging into their web. She was genuine and very helpful in getting me the correct items I needed. The communication about shipping and tracking was great as well. My mind was at ease concerning my investment purchase! Thank you!


      San Jose, California

    • I've been extremely imporessed with the service--from the actual humans answeing phone calls to the accurate and prompt follow up, including and unrequested phone call to follow up on my order delivery requests.


      Fairfax County, Virginia

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