FIREBULL S18 convection stove, glass door, right-hinged door, silver logo These are tubular convection wood-burning stoves designed for rapid room heating without an electric fan. The S18 model falls within the 18 to 45 kW performance range, has a nominal output of 18 kW, and is designed for rooms with a volume of up to 900 m³.
This version features a glass door with right-hand hinges (when viewed from the front) and a silver logo. The glass door allows for visual monitoring of the fire and offers a beautiful view of the flames. Therefore, this stove is also suitable for clubhouses, restaurants, and communal or recreational areas.
Suitable use
The FIREBULL S18 is particularly suitable for large industrial halls, hangars, warehouses, and cultural or event spaces. The output level must be selected based on the building’s heat loss, the ventilation method, the desired temperature, and the actual chimney draft.
This is how the stove works
The cooler air flows into the lower section of the tube casing, heats up around the combustion chamber, and exits back into the room through the upper tube sections via natural airflow. This design combines the radiant heat from the steel body with rapid convection and requires neither a fan nor electrical power.
The dual-chamber combustion system utilizes regulated primary and secondary air. The heat exchanger tubes extend deep into the combustion chamber and, together with a robust deflector, contribute to heat transfer to the flowing air. The concept of tube convection stoves is based on the principle introduced by Eric Darnell in 1975; FIREBULL is an independent Czech product line.
Fuel and air supply
Use only dry wood with a maximum moisture content of approximately 20 %. The stove does not have a separate central external air supply, therefore sufficient combustion air must be ensured in the room. Installation and connection to the chimney must be inspected by a qualified professional.
Technical parameters
| Nominal heat output | 18 kW |
|---|---|
| Output range | 18 to 45 kW |
| Maximum heated room volume | 900 m³ |
| Energy class | A+ |
| Efficiency | 80,7 % |
| Dimensions (H × W × D) | 930 × 690 × 1280 mm |
| Body depth | 108 cm |
| Weight | 195 kg |
| Flue diameter | 180 mm |
| Flue outlet | rear |
| Minimum chimney draught | 12 Pa |
| External combustion air supply | no |
| Fuel | dry firewood |
| Fuel consumption | 11,5 kg/h |
| Maximum log length (optimum) | 108 cm (90 cm) |
| Door type | glazed |
| Finish / configuration | right-hinged door |
| Logo colour | silver |
The stated heating volume is a maximum guideline. The actual achievable volume depends primarily on the building’s heat loss, the climate, fuel quality, chimney draft, and operating mode.
