Description
If you believe that true restoration requires room to breathe, the Ultima L is your definitive choice. As the premier model in our collection, it balances an expansive interior with clean architectural lines, creating an effortlessly spacious retreat suitable for all the family. Crafted from premium thermally treated timber built to withstand the UK climate, the structure offers exceptional thermal mass, ensuring that your sessions remain consistent and immersive.
The interior is curated for group wellness or a vast, solitary retreat. With 2-level Thermo-Aspen benches and LED lighting to the benches and backrest, the cabin transforms into a private gallery of heat and tranquillity. Driven by an upgraded 9kW Electric Yakia Cylindrical floor heater, the Ultima L reaches optimum temperature quickly and efficiently.
Visit our Isle of Man showroom to view our outdoor saunas. Our design specialists are ready to guide you through a bespoke site assessment, ensuring your new spa integrates flawlessly into your outdoor landscape.
Key Features
Flagship Capacity: Seats 4 to 6 people comfortably, making it ideal for families.
Panoramic Double-glazing: Features a double-glazed window and door to create a seamless connection between indoors and outdoors.
Precision Thermal Power: Equipped with an upgraded 9kW Electric Yakia Cylindrical Heater installed on the floor for rapid, steady-state heat control.
Masterpiece Engineering: Built with Alder Wood Lined Walls, a 20mm PIR Heat Insulator, and a 9mm Moisture-resistant OSB board for peak thermal efficiency.
Colour Options: Available in Brown or Natural to suit your specific garden aesthetic.
Important Maintenance & Warranty Information
All external timber must be treated with a high-quality wood preservative immediately after installation to preserve its appearance and ensure long-term performance.
Failure to carry out this treatment will invalidate the warranty.
Yakia recommends Ronseal Trade Total Wood Preserver (Clear) for optimal protection.
Electrical Installation Requirements
Traditional electric sauna heaters require a completely different electrical setup; regular plug sockets will not work.
A qualified electrician must install a new dedicated circuit from your consumer unit, run appropriate gauge cable, and install a double-pole breaker rated for your 9kW heater.
The installation requires a disconnect isolator switch near the sauna.
Ensure all connections are properly grounded, tested, and certified.






