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HUUM Electric Sauna Heaters

Bring premium Nordic sauna design and powerful steam to the home with HUUM electric sauna heaters. The range includes CORE, DROP, CLIFF, HIVE, and STEEL, with models designed for everything from compact home saunas to larger cabins. Choose the right heater based on sauna room volume, power requirements, and preferred control options, with select models available in space-saving Mini configurations.

HUUM Electric Heater Models Explained

 

HUUM produces five electric sauna heater families, CORE, DROP, CLIFF, HIVE, and STEEL, each engineered in Estonia with a shared focus on maximizing stone mass relative to heater size.

 

HUUM CORE

 

HUUM’s compact, floor-mounted electric sauna heater features a distinctive matte black finish and optional bench integration. The Core is available from 6 kW to 11 kW and suits sauna rooms from roughly 5 m³ to 16 m³. It is a strong fit for modern sauna interiors where the heater is meant to blend into the room rather than stand apart from it.

 

HUUM DROP

 

The flagship model and the most widely specified. Its wall-mounted, teardrop-shaped stainless steel cage holds up to 122 lbs of exposed basalt stones. HUUM Drop is available from 4.5 kW to 9 kW and suits sauna rooms from roughly 3 m³ to 13 m³. It’s the natural choice when löyly quality is the primary consideration in a compact, wall-mounted format.

 

HUUM CLIFF

 

The HUUM Cliff is designed for rooms with limited floor space or wall clearance. Its slim, vertical profile allows remarkably short safety distances from combustible surfaces. CLIFF is available from 6 kW up to11 kW in its floor-standing format, covering rooms up to approximately 17 m³, with a separate 3.5 kW CLIFF Mini wall-mounted option for very small sauna rooms.

 

HUUM HIVE

 

The HUUM HIVE brings a distinctive beehive-inspired, round design to larger sauna rooms and holds up to 529 lbs of stones, the highest capacity in the HUUM electric range. Available in 12 kW, 15 kW, and 18 kW outputs, it suits rooms from roughly 12 m³ to 28 m³ and is a popular choice for dedicated sauna rooms and commercial installations where steam quality and long-session performance are the priority. For smaller rooms that still want the beehive stone-basket aesthetic, the HIVE Mini covers 6 kW, 9 kW, and 10.6 kW outputs for rooms in the roughly 5 m³ to 16 m³ range.

 

HUUM STEEL

 

The HUUM STEEL Heater carries an industrial aesthetic and is built for larger or commercial sauna environments, available across a similar output range to CLIFF (6 kW, 9 kW, 10.5 kW), with a STEEL Mini 3.5 kW option for smaller spaces. Higher wattage configurations make it a strong fit where a compact heater’s residential scale is insufficient.

Note: Models at the lower end of each family’s range can typically run on a single-phase supply (depending on circuit configuration and local wiring standards), while higher-output models may require a three-phase supply depending on your region and installation. Confirm your available supply and the specific threshold for your area with a qualified electrician before selecting a model. All five families work with the UKU Wi-Fi controller for app-based scheduling and remote preheat.

 

Choosing the Right HUUM Heater, Sizing Guide

 

To choose the right kilowatt rating for your HUUM heater, start by calculating your sauna room’s volume in cubic metres (length x width x height). The standard baseline is 1 kW per 1 m³ of room volume.

 

From there, apply adjustment factors for your specific build:

 

  • Poorly insulated rooms or outdoor cabins add 20-30% to the baseline figure
  • Large glass panels or glazed walls add approximately 20%
  • Concrete or tile wall surfaces add 20-25%, as these materials absorb more heat before the room reaches temperature

 

For UK installations, most domestic single-phase supplies will support a meaningful portion of the HUUM range on a dedicated circuit; heaters above that threshold typically require a three-phase supply. Consult a qualified electrician before purchasing if you’re considering a higher-output model, since the exact cutoff depends on your existing wiring and local supply capacity.

HUUM’s own sizing tool is available on the HUUM website and gives precise recommendations based on your room dimensions and construction type.

 

HUUM Heater Installation and Electrical Requirements

 

A qualified electrician must install every HUUM electric sauna heater on a dedicated circuit with RCD protection. This is both a safety requirement and a condition of the product warranty.

 

Key installation requirements to be aware of:

 

  • IP rating: Most HUUM electric heaters carry an IP24 rating (splash-proof), suitable for sauna environments.
  • Clearance distances: Stones must sit at least 100 mm below the ceiling; the heater guard must maintain minimum distances from benches and walls as specified in the HUUM installation manual. CLIFF and STEEL models are engineered for notably shorter clearance distances than DROP, HIVE, or CORE.
  • UK regulations: Installation must comply with BS 7671 (18th Edition Wiring Regulations); in England and Wales, sauna heater installation is notifiable under Part P of the Building Regulations.
  • Stone preparation: Wash your sauna stones before placing them in the basket; they carry a fine black dust from manufacture that should be rinsed off before first use (a tip that comes up consistently from installers and is confirmed in HUUM’s own guidance).

For full technical detail, refer to the HUUM installation manual supplied with your heater.

Frequently Asked Questions

Which HUUM electric heater family is right for me?
It depends on your room size and how you want the heater to look. DROP and CORE suit smaller, compact sauna rooms and can be wall-mounted (DROP) or floor-mounted with a discreet finish (CORE). CLIFF and STEEL are best for tight spaces with limited safety clearance. HIVE is the choice for larger rooms and commercial installations where steam quality and stone capacity matter most. Most families also offer a “Mini” version for smaller rooms within that same design style.
Do all HUUM electric heaters work with the UKU app?
Yes. Every HUUM electric heater- family, CORE, DROP, CLIFF, HIVE, and STEEL- is compatible with the HUUM UKU controller system, giving you remote preheat scheduling, timers, and session monitoring through the HUUM app on iOS and Android.
Do higher-output HUUM heaters need a three-phase electrical supply?
It depends on the model and your local electrical setup. Lower-output models across the range typically run on a standard single-phase supply. In contrast, higher-output models may require three-phase power depending on your region’s wiring standards and existing supply capacity. Always confirm the exact requirement for your chosen model and location with a qualified electrician before purchasing.
Why does the HIVE hold so many more stones than other HUUM heaters?
The HIVE’s beehive-inspired, round design maximizes stone mass, holding up to 529 lbs of stones compared to smaller loads in the CORE, DROP, CLIFF, and STEEL lines. More stone mass acts as a thermal reservoir, producing softer, longer-lasting steam and more consistent heat through a session, which is why HIVE is the preferred choice for dedicated sauna rooms and commercial spaces.
Do I need to do anything to the sauna stones before first use?
Yes. HUUM sauna stones carry a fine black dust from the manufacturing process, so it’s worth washing them before placing them in the heater’s basket. This tip comes up consistently from installers and is confirmed in HUUM’s guidance; skipping it can mean a dustier first few sessions than necessary.

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