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HUUM DROP Electric Sauna Heater

HUUM DROP Electric Sauna Heater

Regular price €635,95
Sale price €635,95 Regular price
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Free UK Mainland Delivery over £500*
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Full HUUM Manufacturer Warranty
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Compact Footprint
Even & Consistent Warmth
Quickly Reaches Temperature

The Science of Sauna. The Art of HUUM®.

The HUUM DROP heater reimagines the very essence of sauna heating, balancing elegant form with a powerful core for a truly immersive experience.

Person using a smartphone app to control a device, with a focus on the app interface.

Seamless Control, From Anywhere

Experience the ultimate convenience with the HUUM mobile app. With the optional WiFi-enabled control unit, you can heat your sauna remotely, set a timer, or adjust the temperature, all from your smartphone.

Description

*Stones & Controller to be purchased separately*

(We recommend purchasing 4 x 15kg boxes of the Rounded Olivine Diabase Sauna Stones with this electric heater. You can find the recommended sauna stones here). 

The HUUM DROP electric sauna heater features high-quality materials with an award-winning design inspired by nature. 

The HUUM DROP sauna heater gets its inspiration from a water drop. The round design softens the angular interior of a sauna, giving it a touch of elegance. The compact wall-mounted DROP fits up to 55kg of stones, which guarantees a soft and long-lasting steam, similar to that of wood burning sauna heaters.  

HUUM heaters are manufactured in Estonia, where they are crafted from stainless steel and other high-quality materials. Combined with a stylish, minimalistic Nordic design, the HUUM DROP makes a statement piece in a home sauna.

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).  

Heat Diverter and Heating Elements Retainer (this Huum "Upgrade Kit" is now included with the Drop 9kW model only):

The HUUM 9kW model includes an additional upgrade kit with a heat diverter and a heating elements retainer. These are NOT included with the 4.5kW and 6kW models. 

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

4.5kW: A= 4 in, 100 mm & B= 23.3 in, 590 mm & C= 17.1 in, 435 mm

6kW: A= 4.8 in, 120 mm & B= 24.8 in, 630 mm & C= 17.9 in, 455 mm

9kW: A= 5.9 in, 150 mm & B= 27.2 in, 690 mm & C= 19.1 in, 485 mm

 *SUFFICIENT AMOUNT OF STONES TO BE PURCHASED SEPARATELY 

Product Specification

This heater must be installed by a qualified electrician. The DROP 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.

Model

DROP 4

DROP 6

DROP 9

Sauna room size 

3-7 m³

5-9 m³

8-13 m³

Effect 

4.5 kW 

6 kW 

8.5 kW 

Dimensions 

 

 

 

Height 

590 mm

590 mm

590 mm

Width

390 mm

390 mm

390 mm

Depth

335 mm

335 mm

335 mm

Empty weight

11 KG 

11 KG 

11 KG 

Stone capacity 

55 KG (4 packs)

55 KG (4 packs)

55 KG (4 packs)

Electrical (3N~ 400V)




Front Fuse 

3 X 10 A

3 X 10 A 

3 X 16 A 

Cable Gauge
(UKU Main Module Input)

5-core 1.5 mm² SWA

5-core 1.5 mm² SWA

5-core 2.5 mm² SWA

Cable Gauge
(Heater Input)

5-core 1.5 mm² H07RN-F

5-core 1.5 mm² H07RN-F

5-core 2.5 mm² H07RN-F

Electrical (1N~ 230V)




Front Fuse

1 X 32 A

1 X 40 A

1 X 50 A

Cable Gauge
(UKU Main Module Input)

3-core 4 mm² SWA

3-core 6 mm² SWA

 

3-core 10 mm² SWA


Cable Gauge
(Heater Input)

7-core 1.5 mm² SiHF

7-core 2.5 mm² SiHF

7-core 2.5 mm² SiHF

You can find a video on the Drop installation here

Replacement Elements: In case you need replacement elements for your Huum Drop these are the products you will require: 

The HUUM Heating Elements for DROP Electric Heater Elements are available in 1.5kW and 2kW. 

  • Drop 4.5 (4.5kW): 3x 1.5kW elements

  • Drop 6 (6kW): 3x 2kW elements

  • Drop 9 (8.5kW): 3x 1.5kW & 2x 2kW elements

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 DROP 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.

Technical Specification

Specification HUUM DROP 4.5kW 

Size of sauna 

3-7 

Max. Amount of stones 

55 kg 

Weight without sauna stones 

11 kg 

Height of the sauna heater 

590 mm 

Width 

390 mm 

Depth 

335 mm 

Fuse 

10 A 

Connecting cable 

5x1.5 (N x mm²) 

 

Specifications HUUM DROP 6kW 

Size of sauna 

5-9 m³ 

Max. Amount of stones 

55 kg 

Weight without sauna stones 

11 kg 

Height of the sauna heater 

590 mm 

Width 

390 mm 

Depth 

335 mm 

Fuse 

10 A 

Connecting cable 

5x1.5 (N x mm²)  

 

Specifications HUUM DROP 9kW 

Size of sauna 

8-13 m³ 

Max. Amount of stones 

55 kg 

Weight without sauna stones 

11 kg 

Height of the sauna heater 

590 mm 

Width 

390 mm 

Depth 

335 mm 

Fuse 

16 A 

Connecting cable 

5x2.5 (N x mm²) 

 

Installation
Downloads
Delivery & Returns


For details, see our delivery information here.

Installation Videos
Accessories

FAQs

Why are sauna stones important for electric heaters?

Stones absorb and release heat gradually, helping to regulate the sauna environment. They also allow you to create löyly, soft bursts of steam, by pouring water over the hot surface. We supply high-quality olivine diabase and vulcanite stones, chosen for durability, heat retention, and even steam distribution.

What are the control options for sauna electric heaters?

You can choose between:

- Manual dials (typically integrated into the heater)
- Wall-mounted digital control panels
- Wi-Fi-enabled remote systems (via smartphone app)

Wi-Fi control allows you to preheat your sauna, set timers, and adjust temperature settings remotely, perfect for busy schedules or spontaneous sauna use.

Can I use electric sauna heaters in an outdoor sauna?

Yes, our electric heaters for sauna buildings are suitable for outdoor saunas as long as the space is properly insulated and protected from the elements. Many UK customers install them in garden cabins or purpose-built outdoor spaces. A qualified electrician should handle all electrical installations to ensure compliance.

How do I know which size sauna electric heaters is best?

Heater size depends on your sauna’s internal volume. As a rule of thumb, allow 1kW of power per 1 to 1.5 cubic metres. You may need a more powerful unit if your sauna includes large glass panels, poor insulation, or outdoor exposure. Our team can advise on the most efficient model based on your specific layout.

Glass loses heat more quickly than timber, so it increases the effective size of the sauna for heating purposes. The adjustments are:

Single-glazed glass adds 1.5m³ per 1m² of glass

Double-glazed glass adds 0.75m³ per 1m² of glass.

Are HUUM sauna heaters suitable for DIY sauna builds?

Yes, both electric and wood-fired options are well-suited to DIY sauna projects, provided they're installed safely and in line with local regulations.

If you're building your own sauna, we know it can be a daunting task. That's why our expert team offers free consultations, and material planning to help you get it right.

Whether you just need help choosing the right HUUM sauna heater, or need to assemble your full materials basket, we'll make sure you have everything needed to build a sauna that's authentic, safe, and made to last.

What makes HUUM sauna heaters unique in the market?

HUUM sauna heaters combine Estonian sauna tradition with modern design and smart functionality – a balance few brands achieve.

Founded by Siim Nellis, whose family has built sauna stoves for generations, HUUM draws on deep cultural knowledge to create heaters that prioritise soft steam, efficient performance, and timeless aesthetics. Whether electric or wood-burning, every HUUM sauna stove is crafted in Estonia using durable materials, minimalist forms, and a clear respect for the sauna as a ritual.