Experience the ultimate relaxation with the award winning Saunum Spa Session Heater, a revolutionary five-in-one sauna heater that transforms your home into a spa oasis. Designed for the whole family, it combines a large stone volume with a unique stone basket solution and a patented air mixing system. This innovative combination ensures a soft, long-lasting, and evenly distributed steam that's gentle on your skin and easy to breathe, making every sauna session a therapeutic delight.
Included in the Set
The Heater
Climate device
Salt Balls (7 pieces)
Controller (Inside the heater)
Leil 1.1 Touchscreen Interface
1st PLACE AT THE GOLDEN WAVE AWARDS
Saunum Spa Session sauna heater wins the Golden Wave 2024 award for the most innovative technology.
Versatile Spa Settings
The Saunum Spa Session Heater offers an unrivalled sauna experience, allowing you to enjoy various spa settings: from a classic Nordic sauna to a salt ion-enriched steam bath, a humid steam-rich sauna, a mild relaxation sauna, or an aromatic sauna. Each setting is designed to cater to your wellness needs, providing health benefits like improved respiratory function and intense relaxation.
Durable and Stylish Design
Crafted with Magnelis® and stainless steel, this timeless, classic heater design is not just a visually appealing addition to your home but also a durable and energy-efficient choice. It boasts a dual-level stone basket for prolonged heat retention and features corrosion-resistant heating elements for long-lasting performance. Plus, with the steam guidance positioner, you can easily control the distribution of steam to your preference.
Customisable Comfort
The Saunum Spa Session Heater is versatile and can be installed alongside a wall or in a corner of the sauna room. It's designed to heat the sauna room to temperatures ranging from 40 to 90 °C while maintaining a balanced climate, offering you a range of experiences from intense heat to a gentle, humid environment.
Enhance your sauna experience with the Leil control unit. This user-friendly interface allows you to easily control the heater and adjust the climate settings, providing a convenient way to customise your sauna sessions.
Embrace the therapeutic benefits of salt therapy with the patented method of enriching the air with salt ions. This feature infuses salt ions from natural salt spheres into the circulating air, reaching your skin and respiratory tract. It's especially beneficial for respiratory conditions, offering decongestant properties and antimicrobial benefits.
Health-Enhancing Features
The Saunum Spa Session Heater also incorporates an aromatherapy system. By mixing sauna essential oil aromas within the steam, it adds an extra layer of sensory pleasure to your sauna experience, making it a healthy alternative to burning aromatic oil on the hot stones.
How to Install Your Spa Session
Saunum Spa Session Specifications
Specification
Detail
Heater Power
6 kW / 9 kW
Sauna Room Size
6–9m³ / 9–12 m³
Temperature Range
40 to 90 °C
Minimum Room Height
1900 mm
Safety Distance
Sides: 50 mm, Front: 50 mm, Ceiling: 700 mm
Included Accessories
Stone basket, Climate device, Controller
Colour
Black
Climate Device Levels
3 speed levels
Dimensions (HxWxD)
1160 x 365 x 490 mm
Net Weight
57 kg
Electrical Requirements
6kW - 13 Amp Supply, 9kW - 32 Amp Supply
Power Cable
SiHF 5 x 2.5 mm²
Water Resistance
IPX4
Additional Requirements
Saunum sauna oil set
Delivery
All Saunum heaters take one to two weeks to arrive to the mainland UK. As with all products at Heracles Wellness, delivery is free.
Installation
Installation of Saunum heaters is straight forward. However, we recommend that they are always installed by a qualified electrician, it's better to be safe than sorry.
Warranty Coverage: Product free from material and manufacturing defects.
Validity: From the date of delivery.
Warranty Service:
In case of defects due to material or assembly quality, we will recommend repair partners will repair or replace the device or its part.
Labour and spare parts charges are waived.
Saunum decides on component replacement or device exchange.
Replaced components become Saunum's property.
Consumers retain legal rights against the seller.
Warranty Conditions:
Installation Report: Warranty valid with a completed installation report.
Installation: Device must be installed by a qualified electrician per regulations.
Private Sauna Use: Warranty for sauna climate device is 2 years.
Public Sauna Use: Warranty for sauna climate device is 1 year.
Exclusions:
Routine maintenance, cleaning, and wear and tear part replacement.
Unauthorised device adaptations or modifications.
Transport-related risks.
Misuse, improper installation, or unauthorised repairs.
Damage from accidents, lightning, water, fire, poor ventilation, etc.
Faults from non-recommended stones and salt balls.
Heaters and salt balls are not covered.
Warranty Claims:
For warranty claims, please contact Heracles Wellness. We will guide you through the process and connect you with the necessary service technicians.
Important Notes:
Sauna climate devices must be connected by a professional electrician.
Read and keep the user manual for reference and maintenance guidance.
14-day return policy
Should the goods purchased from not be suitable to you for some reason, you have the right to return the product within 14 days and get a 100% refund.
In order to return the product, please send us an email (info@heracleswellness.co.uk) and we will guide you from there.
In the event of deterioration of the goods, the buyer shall be liable for the reduction in value if he has used the goods in a manner other than necessary to ascertain their nature, characteristics and functioning. In order to inspect the nature, characteristics and functioning of the products, the buyer may handle and use them only as he is normally allowed to do in the shop.
We will refund the sum paid for the returned product to the purchaser’s bank account without delay, but no later than within 14 days from the date we receive a withdrawal application from the purchaser.
The return policy does not apply to goods that are not suitable for returning due to health protection or hygiene reasons and if the goods have been opened following delivery.
The electrical supply required will depend on the kW rating of your chosen sauna heater. We strongly recommend consulting with a qualified electrician prior to any installation.
Typically, a dedicated supply is required—similar to those used for electric showers or cookers. Most domestic sauna heaters in the UK are connected to a single-phase 230V supply, and the Amps can be calculated using:
Watts ÷ Volts = Amps
For example: a 6kW (6000W) heater ÷ 230V = approximately 26 Amps
Below is a general guide for domestic sauna heaters:
Heater Power - Current Draw - Suggested Cable Size (Single-Phase)
2.3 kW - 10 Amps - 1.5 mm²
3.0 kW - 13 Amps - 2.5 mm²
3.6 kW - 15 Amps - 2.5 mm²
4.5 kW - 19 Amps - 2.5–4.0 mm²
6.0 kW - 26 Amps - 4.0 mm²
8.0 kW - 35 Amps - 6.0 mm²
9.0 kW - 40 Amps - 6.0 mm² (or higher, depending on cable run) Cable size depends on cable length, installation method, and other on-site factors. Always defer to your electrician’s judgment.
We strongly advise that installation is carried out by a fully qualified electrician, and that all work complies with current Government regulations and wiring standards (e.g., BS 7671 in the UK).
The Saunum Spa Session comes in 6kW and 9kW. The 6kW version can be run from a regular 13 Amp supply, but the 9kW version will require a 32 Amp supply.
We highly recommend consulting with a qualified electrician prior to installing your heater to ensure you have the correct set up.
Temperature 60 °C–100 °C Climate regulating system: speed level 1, valve 25% open
Humid Steam-Rich Sauna
Temperature 45 °C–60 °C Climate regulating system: speed level 2 or 3, the valve 100% open
Mild, Relaxing Sauna
Temperature 40 °C–55 °C Climate regulating system: speed level 1, the valve at least 25% open
Sauna With Salt Ions
Temperature 40 °C–100 °C Climate regulating system: speed level 1, the valve 25% open, salt spheres added to the climate device
Aromatherapy Sauna
Temperature 40 °C–90 °C Climate regulating system: speed level 1, the valve 25% open, Replace a salt sphere with an aroma bowl, add some Saunum aroma oil
The Sauna of the Next Century
How Does Saunums 5-in-1 Patented Technology Work?
Saunum’s patented air-blending system traps the scorching steam, that rises under the ceiling of the sauna room, mixes it with cooler air on the floor surface, and directs the soft steam back evenly. This ensures a more even temperature of the steam, and the oxygen-enriched steam makes it easier to breathe. Water can be thrown more often to produce more steam, making the sauna air more humid, and ensuring more intense sweat. With Saunum’s patented method of enriching the air with salt ions, the salt ions from the natural salt spheres added to the sauna climate device are infused into the circulating air to reach the skin and respiratory tract. An even more relaxing sauna experience is created with the help of the aroma system, which mixes sauna oil aromas with the steam. It is a healthy alternative to burning aromatic oil on hot stones.
Saunum FAQ's
Can these saunas be delivered flat pack and assembled on site?
No, all Saunum saunas are delivered fully assembled. This is to ensure the integrity of the structure and to prevent any draughts or openings that could lead to damage.
Do I need a crane?
This will depend on the location that you wish to place your sauna. If there is sufficient access, the sauna can be positioned with a fork lift.
If I do need a crane, can you organise this for me?
We deliver the sauna to your location free of charge, however, the cost of a crane will vary significantly depending on the site. We advise that you organise your own crane/HIAB with a local contractor. If you wish, we can organise this for you, but it will always be cheaper to organise it yourself.
Why do the saunas not include a heater in the price?
There are many different specifications of Saunum heaters that cater for different budgets. Some customers already have a heater and only want the structure.
We are thrilled with our Sauna, delivered nice and fast.
The materials are lovely and the kit has everything to get you going.
I was throughly impressed how good good the unit it is, and it seems to be a better price than anywhere else.
The only thing I would say is that instructions could do with some work.
Camilla Traditional Outdoor Sauna Complete Kit 3-4 Person
Customer Steve Dite
Our sauna Steve and Julie
I can’t recommend Heracles enough the service and product are first class, Ordering , delivery and installation completed within 2 weeks, where as I had been waiting for over a year from another company.
Keith was first class with all his advice and the installation team completed the install in about 6 hours truly a faultless service.
Thank you all for our lovely sauna 2 very happy customers.
Steve and Julie
Camilla Traditional Outdoor Sauna Complete Kit 3-4 Person
Mike W
Great
Great unit, great staff. Awesome high quality product. Thanks
Saunasell Patio XXS 3 Person Outdoor Sauna
Sally T
Sauna dream come true!
When we first seriously starting thinking about installing a sauna at home we did a lot of research about the different companies and products available. Heracles Wellness stood out from the crowd, both with the detailed information available on their website and the number of glowing customer reviews.
A helpful call with Keith later on in the process helped answer all our questions around ongoing maintenance needs, installation concerns and costs, particularly around the electrical install which, depending on the planned location of your sauna can be a considerable extra expense.
Delivery and installation was prompt, efficient and at a time that suited us. Communication throughout was timely, friendly and helpful. We elected to have the Heracles team install the sauna and we are so glad that we did, the quality of the build is truly excellent.
We couldn't be happier with our sauna set up and know that we'll only continue to see the benefits and enjoyment of it as the darker nights draw in. I wouldn't hesitate to recommend Heracles Wellness and advise anyone who is thinking about installing a home sauna to do it, you won't regret it!
Camilla Barrel Outdoor Sauna Complete Kit 2-3 Person
Olga D
Camilla Traditional Outdoor Sauna Complete Kit 3-4 Person
Customer from East Sussex. On 23 July 25 my sauna kit was delivered and on 25 July 2025 it was assembled. I had great experience with Heracles Wellness. I chose them among a wide range of companies due to their great reviews, thorough information on the website, competitive price and great support through the purchase, delivery and assembly service. I had my initial chat with Keith on the website. He was amazing and really patient with all my many questions. This an expensive investment for my family and Keith was great to ensure understand all aspects of this purchase and warranty. Then, it was Abdullah who took over updating me on every step and booking delivery and assemly. I do not recall the name of the delivery person, but he was ever so careful and polite. The assembly team, Pavel’s team arrived on time and worked non-stop to put the sauna together. I really recommend assembly as it is hassle free service. I had my own electrician connecting the sauna which was quick. I might need to mention that the reset button on the heater may require some force as switch is stiff when you. We were afraid to apply the force not to break anything and the sauna did not heat up more than 49 degrees Celsius. We found the information about adding some force initially on support Harvia website. The sauna heated the first time in about 39-35 minutes to 90 degrees. We had a go with my family and it was AMAZING 🤩. We will be enjoying the sauna more often from now on as it has a lot of health benefits. My skin was rejuvenated after the session. We already applied the Tikkurila sauna protection oil inside out, as recommended on the HW website. It made the wood just slightly darker, cheek blush effect I called it :). Also added an extra pleasant fragrance to the wood. The wood smell inside the sauna is also great. All in all, I am ever so grateful to HW guys. I hope the sauna will work well and serve us many years of joy. I strongly recommend HW for being professional and supportive! Adding some photos to convince those who are in decision mode…. 😎
Camilla Traditional Outdoor Sauna Complete Kit 3-4 Person