Description
Product information updated 2026-11-11
Wood-fired sauna heater of traditional Finnish design is intended for small-volume saunas - from 6 to 10 m3.
The heater can be loaded with a large amount of stones (30 - 40 kg, stone size 5-10 cm in diameter) and has an insulated combustion chamber, therefore the steam generated by these heaters is extremely soft and even.
The heater's combustion chamber is made so as to use the energy released by the firewood as efficiently as possible. By installing additional air channels in the heater, an efficient combustion process is created, which generates more energy from the same amount of firewood. Thus nature is less polluted, because the energy obtained from the firewood is burned, and not removed through the chimney.
Grannus – 8 has a front door glass, which will allow You to admire the burning fire while you are warming yourself in the sauna. Also on this type of heater a chimney-mounted water tank for hot water can be installed. For your convenience, there is an option to change the door opening side.
It is recommended to install the heater at a safe distance from combustible materials (front x sides x height): 1000 x 500 x 1400 mm.
Smoke outlet at the top.
Firewood up to 25 cm long is suitable.
Specifications
| Model | GRANNUS 8 kW |
| Power, kW | 8 |
| Sauna volume, m³ | 6 – 10 |
| Stone capacity (max.), kg | 30 – 40 |
| Dimensions (A/P/G), mm | 600 / 440 / 510 |
| Chimney diameter, mm | 115 |
| Firebox | Internal |
| Firewood length (max.), mm | 250 |
| Safe distance in front, mm | 1000 |
| Safe distance to the sides, mm | 500 |
| Safe distance upwards, mm | 1400 |
| Warranty | 36 months |
