HUUM 9kW Face-Off: Which Iconic Estonian Heater Belongs in Your Sauna?

The secret to a perfect sauna experience isn’t just the bench or the view – it’s the heater. As the engine of your wellness space, it dictates the texture of the steam and the depth of your relaxation. HUUM, a pioneering Estonian company, has emerged as a leader in the industry, masterfully blending nature-inspired design with cutting-edge technology to create sauna heaters that are both beautiful and powerful.

This article provides a simple comparison of four distinct 9kW electric sauna heaters from HUUM: the HIVE Mini, the STEEL, the DROP, and the CORE Wall Combi. By examining their unique features, design philosophies, and performance characteristics, we aim to help you identify the perfect heater to elevate your home sauna into a personal oasis.

The heart of the sauna: Key considerations
Before diving into specific models, it’s important to understand the factors that define a superior sauna experience. The stone capacity of a heater is paramount; a larger volume of stones retains heat for longer and produces a gentler, more humid, and longer-lasting steam, or löyly, which is the essence of the traditional sauna experience. Design and installation type – whether floor-standing or wall-mounted – also play a significant role, impacting not only the aesthetic of your sauna but also on the efficient use of space. Finally, modern heaters may offer special features, such as integrated steam functions that provide a more versatile, spa-like experience.

The contenders: An overview
Each of the four HUUM heaters offers a unique approach to the sauna experience, though all are designed for similarly sized sauna rooms (8-15 m³). The following table summarizes their key specifications for a quick comparison.

Feature | HUUM HIVE Mini | HUUM STEEL | HUUM DROP 9 | HUUM CORE Wall Combi
Design | Beehive-inspired, round | Slim, vertical tower | Water droplet shape | Minimalist, black box
Installation | Floor-standing | Floor-standing | Wall-mounted | Wall-mounted
Power | 9 kW | 9 kW | 8.5 kW | 9 kW (plus 2kW steamer)
Stone Capacity | 150 kg | 150 kg | 55 kg | 20 kg
Dimensions (H x W x D) | 75 x 46 cm | 97.5 x 32 x 32 cm | 59 x 39 x 33.5 cm | 55.1 x 40 x 40 cm
Key Feature | High stone capacity | Space-saving, fast heating | Award-winning design | Integrated steam & aroma

Design and aesthetics
HUUM has built its reputation on creating heaters that are functional sculptures. The HUUM DROP is the most decorated of the group, having won the prestigious Red Dot Design Award for its organic, water-droplet-inspired form. It mounts to the wall like a piece of art, making it a stunning centerpiece for any sauna.

The HIVE Mini takes its cues from a beehive, with a round, open-air design that beautifully shows its large stone capacity. It is a floor-standing model that brings a majestic, natural element to the sauna.

The STEEL heater offers a modern, minimalist aesthetic with its slender, vertical stainless-steel body. It is designed for efficiency and a sleek look, perfect for contemporary sauna interiors.

Finally, the CORE Wall Combi presents a clean, minimalist black box that is both discreet and sophisticated. Its wall-mounted design is focused on saving space while delivering a powerful, versatile performance.

Performance and steam quality
When it comes to steam, stone capacity is king. The HIVE Mini and STEEL models are the champions in this regard, both holding an impressive 150 kg of stones. This massive thermal mass ensures a soft, consistent, and long-lasting steam that envelops the bather. The STEEL model also features a special internal air tunnel that accelerates heating by up to 25%, a significant advantage for those who want their sauna ready quickly.
The DROP, while smaller in stone capacity at 55 kg, still surpasses many standard wall-mounted heaters and is praised for its gentle steam, making it an excellent choice for a compact, design-focused sauna. The CORE Wall Combi, with its 20 kg stone capacity, focuses less on massive steam volume from the stones and more on its specialized steam function.

Special features: The combi advantage
The HUUM CORE Wall Combi is the most versatile heater in this lineup. It is a combi heater, which means it has an integrated steamer and an aroma basin. This dual functionality allows you to enjoy a traditional dry sauna or a softer, more humid steam sauna. You can even add essential oils to the aroma basin for a spa-like aromatherapy session. This makes the CORE Wall Combi a perfect choice for those who desire a variety of sauna experiences in one compact unit.

Installation and space
For smaller saunas, space is a critical consideration. The wall-mounted DROP and CORE Wall Combi heaters are excellent space-savers, freeing up valuable floor area for seating and movement. The STEEL heater, while floor-standing, has a very small footprint (32×32 cm), making it another great option for compact spaces that can accommodate a floor unit. The HIVE Mini, with its larger diameter (46 cm), requires more floor space but rewards the user with its immense stone capacity.

All heaters require professional installation by a certified electrician and must adhere to specific safety distances from combustible materials, as detailed in their respective manuals.

Which HUUM heater is right for you?
Choosing the right HUUM heater ultimately depends on your personal priorities and the specific needs of your sauna space.

A) If design and aesthetics are your primary motivation, the HUUM DROP is an undeniable showstopper that delivers quality sauna experience.

B) If you are a traditionalist seeking the most authentic and powerful steam experience, the high stone capacity of the HUUM HIVE Mini or the HUUM STEEL is unmatched.

C) If you value versatility and a spa-like experience with multiple steam and aroma options, the HUUM CORE Wall Combi is the clear winner, offering a range of experiences in a single, elegant package.

D) For those with limited space, the wall-mounted DROP and CORE Wall Combi, or the slim STEEL floor model, offer excellent solutions without compromising on quality.

No matter which model you choose, a HUUM heater represents an investment in quality, design, and the timeless tradition of the sauna. By combining ancient knowledge with modern technology, HUUM has created a range of heaters that can transform any home into a sanctuary of wellness.