Celsium Jonas mini garden sauna - compact
incl. VAT
🚚 Free shipping to the EU mainland & Switzerland for orders over €300
Exclusive garden sauna for small spaces
The Jonas Mini is the most compact garden sauna in the Celsium series - designed for relaxing moments alone or as a couple. With its reduced floor plan, it blends harmoniously into small gardens, terraces or even spacious balconies. The door can be positioned either at the side or in the middle to fit perfectly into your outdoor retreat.
Jonas mini garden sauna - minimalist, functional, relaxing
This sauna stands for conscious design in outdoor areas: small in size, big in experience. It is the ideal choice for urban living situations or limited garden areas, yet still offers the full, authentic sauna experience.


Jonas Mini design garden sauna - aesthetics & choice of materials
The protected EUIPO design combines clean lines with high-quality materials. Choose between natural spruce, expressive Shou Sugi Ban or durable thermo pine. Color variants such as beige, grey, ebony, teak or hazel set individual accents to match your garden ambience.
Jonas Mini solid wood garden sauna - Technology & equipment
Whether classic wood-burning stove or modern electric heater - the selection ranges from compact Harvia models to powerful heating systems with WiFi control. Glass surfaces can be flexibly designed: from a simple front door to panoramic glazing that opens up the view into your garden.
Jonas mini outdoor garden sauna - use & comfort
Designed for two Persons, the Jonas Mini impresses with comfortable lime wood benches, optionally in black alder or thermo pine. Ideal as a daily wellness retreat in your own garden - delivered either pre-assembled or as a practical kit.
Experience soothing warmth in your garden
Design your Jonas Mini garden sauna exactly as you want it - from the type of wood and color to the glass surfaces and heating system.
🔶 Scope of delivery
Everything at a glance - what's included!
- Sauna body in selected wood type and color
- Roof in selected design
- Glass elements of your choice
- Lime benches (standard)
- Selected Sauna heater
- Matching chimney (for wood-burning stoves)
- Assembly material
- Assembly instructions
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 | 2 Persons |
| Dimensions (WxHxD) | 1.85 m x 2.3 m x 1.22 m |
| Weight | approx. 250 kg |
| Exterior materials | Spruce, Thermotre (thermo-treated spruce), Shou Sugi Ban spruce |
| Glass front | 8 mm tempered safety glass |
| Bench & backrest | Solid wood benches incl. backrests |
| Lighting | LED interior lighting can be integrated |
| Stove options | Harvia Spirit 9 kW (digital + WLAN), Harvia Cilindro 9 kW, Harvia M3 wood stove, Cozy 12 |
| Insulation option | Selectable: Wall, floor and roof insulation (optionally available) |
| Delivery condition | Fully assembled or optionally flat-packed |
| Basic requirements | Level, stable foundation required, own transport & unloading required (optional crane service) |
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 the 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)