The ETNA 18.4 kW wood-burning sauna heater is a compact yet exceptionally powerful sauna heater,
developed for large outdoor saunas where fast heat-up, stable heat and full independence are key.
With an output of 18.4 kW, this model is suitable for sauna cabins of up to
18 m³ and heats even large outdoor saunas quickly and efficiently – even in winter.
Suitable for
- Barrel saunas 240 cm
- Barrel saunas 340 cm
- QUADRO saunas 240 cm
- QUADRO saunas 340 cm
- large outdoor saunas
Key benefits
- Very high output — 18.4 kW ensures fast heat-up and reliable performance even at low temperatures.
- External firebox — firewood is loaded from outside or from the adjoining room, keeping the sauna cabin clean.
- Quick-lock door and decorative frame — make wall mounting easier and ensure a neat finish.
- Large stone capacity (up to 100 kg) — provides plenty of soft, even steam.
- Efficient and durable construction — cast-iron grates, an additional air supply and two flame deflectors improve combustion and durability.
- Fully independent — no electrical connection required.
Technical specifications
| Heater type | Wood-burning |
|---|---|
| Output | 18.4 kW |
| Firebox position | External, wall-mounted |
| Sauna volume | Up to 18 m³ |
| Stone capacity | Approx. 100 kg |
| Certification | CE |
Important: The heater is CE certified.
Please note: Sauna stones (100 kg) are not included and must be purchased separately.
Delivery information: To keep delivery costs down, the heater is supplied unassembled.
Installation note: Before final installation, the heater should be burned outdoors for approximately
30 minutes to burn off the factory paint.
Safety recommendation: Place a non-combustible base under the heater, such as a stone or concrete slab.
Recommended size approx. 60 × 40 cm, typical thickness 7–10 cm.
Summary: The ETNA 18.4 kW is a high-performance sauna heater for large outdoor saunas, combining fast heat-up,
a large stone capacity, external loading and reliable independent operation.
