The elegance of robust wood Naturally Reinforced
The Onyxia Cube is a spacious and elegant sauna, designed to accommodate up to 4 people. Its contemporary design combines durable materials with intense heat for an immersive experience of relaxation and revitalization.
Thanks to ThermoWood® technology, it offers exceptional durability. Its large bay window allows you to enjoy the landscape in complete privacy, creating a true haven of peace. Manufactured in Europe, it embodies the perfect blend of modernity, comfort, and authenticity.
What makes this sauna unique

Designed for outdoor longevity
ThermoWood® is wood treated at high temperatures without the addition of chemicals. This natural process reduces its moisture content, improves its dimensional stability, and enhances its resistance to climatic variations, humidity, and insects.
Ideal for outdoor installation, it retains its elegance through the seasons and guarantees superior longevity, perfectly suited for a high-end sauna.
Designed and manufactured in Europe
Each sauna is developed and assembled in Europe according to demanding quality and precision standards. This controlled manufacturing process ensures rigorous control of materials, finishes, and technical performance.
European expertise ensures structural durability, a refined aesthetic, and long-term reliability, positioning the product in a resolutely premium approach.


An aesthetic that reflects you
Choose the facade that matches your environment and usage: a large glass surface for total immersion in the landscape, or a more intimate version to preserve your tranquility.
At the rear, opt for an elegant half-moon glass panel allowing natural light to enter, or a more enveloping solid wall. Each configuration allows the sauna to be adapted to your architectural vision.
The sauna ritual in its purest form
Equipped with an electric stove with volcanic stones, the sauna recreates the authentic experience of the Finnish ritual. By pouring water over the heated stones, a dense and homogeneous steam gradually diffuses, enveloping the space with controlled heat. This gentle and immersive rise in temperature provides deep relaxation and lasting well-being, respecting the traditional codes of the Nordic sauna.

Premium equipment levels,
carefully designed for your well-being
Technical specifications
The Onyxia Range
Onyxia Cube
- Capacity
- 4 seated places or 2 lying down
- Floor dimensions
- 166 x 212 cm
- External dimensions
- 210 x 160 x 220 cm
- Stove power
- Recommended electric stove from 4.5 kW (not included)
- Temperature
- Up to 85°C
- Accessories
- 1 floor protection mat included
- Bench
- Double bench height
- Equipment
- LED strip
- Power supply
- 220/240V
- Accessories
- Traditional sauna kit included (Bucket, ladle, thermometer/hygrometer, hourglass)
- Door
- 8mm secure glass door
- Warranty
- Electronics 2 years / Woodwork 4 years
Onyxia Barrel
- Capacity
- 6 seated places or 2 lying down
- Floor dimensions
- 240 x 220 cm
- External dimensions
- 225 x 240 x 226 cm
- Stove power
- Compatible with a 6 to 8 kW electric stove, or a wood-burning stove
- Temperature
- Up to 85°C
- Accessories
- Traditional sauna kit included (Bucket, ladle, thermometer/hygrometer, hourglass)
- Bench
- 2 benches facing each other
- Equipment
- Outdoor terrace – Rear half-moon window – LED strip
- Power supply
- 220/240V
- Door
- 8mm secure glass door
- Warranty
- Electronics 2 years / Woodwork 4 years
Tempted by our saunas?
Find your ideal sauna at one of our dealers near you. They offer a wide range of saunas suited to all your needs.
Still not sure?
Discover other saunas from the Holl’s range, designed to suit your expectations, your space, and your lifestyle.