Celsium Ula Large garden sauna with covered vestibule
incl. VAT
🚚 Free shipping to the EU mainland & Switzerland for orders over €300
Elegant wellness for a sophisticated outdoor ambience
The Ula Large sauna combines sophisticated design with practical additional comfort. It builds on the clear, organic tone of the Ula series - enhanced by an elegant, covered front area. The result is a luxurious oasis of well-being, perfect for patios, gardens or roof terraces.
Product character of a Ula Large wellness cabin
The Ula Large sauna is a spacious outdoor sauna with a full interior like the Ula Small - supplemented by a sheltered anteroom. This provides space for cooling down or storage. It is aimed at users who value design and functionality.


Design & materials of the Ula Large designer sauna
The architecturally clear appearance with a rounded silhouette and clear lines makes the Ula Large a stylish eye-catcher. Exterior materials and color variants correspond to the Ula collection (e.g. Sugi-Ban, Thermowood etc.), whereby the covered vestibule is harmoniously integrated into the overall design.
Technology & functions of the solid wood sauna Ula Large
sauna has a fully dimensioned interior for a classic sauna experience. The covered vestibule can be used flexibly - for example as a relaxation area or for storage. As with all Ula models, state-of-the-art technology is combined with minimal structural effort - without smoke extraction, with quiet, electric heat.
Use & comfort of the Ula Large wellness unit
The Ula Large is ideal for all those who want to enjoy regular outdoor wellness - with more space to move around and options for using the anteroom. Whether it's relaxation after sweating or storage space for equipment - this added value makes the sauna particularly comfortable.
Discover now - your personal wellness room
Experience space, tranquillity and high-quality sauna enjoyment in a design that elegantly adapts to your living space.
🔶 Scope of delivery
Everything at a glance - what's included!
- Exterior structure of the sauna (incl. front area and roof structure)
- Interior space in full sauna size
- Covered vestibule according to model
- Cladding made of thermo-treated wood or Sugi Ban (according to selection)
- Documentation on Installation and maintenance
Individual sauna solutions for the highest demands
Are you planning something special and looking for a solution that exactly matches your ideas?
Whether custom-made sizes, individual material requests, special color concepts or technical adaptations - almost anything is possible.
Thanks to flexible production, even demanding special requests can be professionally realized - with the aim of creating a wellness experience that fits seamlessly into your living space.
Do you have a special idea?
- Contact us directly - we will advise you personally and develop your dream sauna together.
Specifications
| Sauna capacity | up to 6 Persons |
| Dimensions (WxHxD) | 2.2m x 2.38m x 2.84m |
| Floor space | approx. 6.7 m² |
| Weight | approx. 600 kg (depending on version) |
| Exterior cladding | Thermally treated spruce wood or Sugi Ban (depending on color choice) |
| Color variants | Black (charred), natural (light), opaque white |
| Roof options | Bitumen shingles in honeycomb look, black |
| Inner benches | Two reclining surfaces made of solid wood, ergonomically adapted |
| Benches | Inside: two wide benches for sitting/reclining |
| Heating | Compatible with electric or wood-burning stoves (e.g. Harvia or HUUM) |
| Assembly formats | Pre-assembled segments, ready to install, suitable for point foundation or concrete slabs |
| Plank thickness | 44mm |
Guide: How to choose the right Sauna heater for your Celsium garden sauna
The right Sauna heater is crucial to the overall sauna experience - it affects heat quality, heat-up time and energy efficiency. To help you realize the full potential of your Celsium garden sauna, here is a compact and well-founded guide to choosing the right heater.
1. calculate the room volume correctly
First determine the internal volume of your sauna:
Width × depth × height = m³ (cubic meters)
Example for the Ula Micro: 1.35 m × 1.25 m × 2.30 m = approx. 3.9 m³
Important:
If your sauna has glass elements, thin outer walls or a free-standing location in the garden, you should add approx. 1.5 m³ per square meter of uninsulated area. This so-called insulation reserve compensates for heat loss.
2. choose the right heat output
The following applies as a guideline
1 kW heating output per 1 m³ room volume
- For 4 m³ → ideally a stove with 4 kW
- For intermediate values, round up rather than down - so that your stove works reliably even at low outside temperatures
3. note the power connection
Depending on the model and output, there are two variants:
- 230 V connection (Schuko plug) for compact sauna heaters
- 400 V three-phase current (heavy current) for more powerful models
Note: The connection must always be carried out by a qualified electrician.
5. control & comfort functions
Modern controls not only offer temperature control, but also timer functions, app control and safety:
- Manual: classic rotary control module
- Digital: external control unit with precise temperature control
- Smart: App control via WLAN or 4G (e.g. HUUM UKU Wi-Fi)
