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KALVIS K-2-12 N 12kW solid fuel boiler
KALVIS K-2-12 N is a lower-combustion solid-fuel central-heating boiler with a nominal output of 12 kW. It is designed for heating residential and other small buildings, while its compact construction makes it suitable for smaller boiler rooms.
The boiler has a 42-litre fuel chamber and is primarily intended for burning wood logs. KALVIS also permits the use of wood waste, sawdust briquettes and peat briquettes. Firewood with a moisture content above 25% is not recommended.
Efficiency when burning wood logs is 82%. One fuel load can burn for up to 8 hours, while the maximum wood-log length is 30 cm. Actual burn time depends on fuel type, moisture content, outdoor temperature and other operating conditions.
Boiler temperature is automatically regulated. The construction includes draught and smoke dampers, a heat-exchanger turbulator, cooling coil, secondary-air supply, refractory combustion-chamber bricks, ash drawer, fire grate and fire-grate shaking mechanism. The heat exchanger can be cleaned from both sides of the boiler.
The inner-wall steel thickness is 6 mm, and KALVIS provides a 4-year warranty for the boiler body.
Main advantages
Lower-combustion solid-fuel boiler
Nominal output 12 kW
High efficiency – 82%
Large 42 l fuel chamber
Fuel burn time up to 8 hours
Automatically regulated boiler temperature
Secondary-air supply
Cooling coil
Heat-exchanger turbulator
Heat exchanger cleaning from both sides
Fire-grate shaking mechanism
Maximum log length 30 cm
6 mm inner-wall steel thickness
4-year boiler body warranty.
Technical information
| Parameter | Value |
|---|---|
| Manufacturer | KALVIS |
| Model | K-2-12 N |
| Boiler type | Lower-combustion solid-fuel central-heating boiler |
| Nominal output | 12 kW |
| Heated area, B-class buildings | 103–252 m² |
| Heated area, C-class buildings | 55–132 m² |
| Fuel | Wood logs |
| Additional fuels | Wood waste, sawdust briquettes, peat briquettes |
| Efficiency with wood logs | 82 % |
| Fuel chamber volume | 42 l |
| Fuel burn time | up to 8 h |
| Maximum log length | 30 cm |
| Boiler water volume | 28 l |
| Flue diameter | Ø160 mm |
| Minimum chimney draught | 12 Pa |
| Dimensions (H × W × D) | 880 × 630 × 970 mm |
| Gross weight | 222 kg ±10 % |
| Inner-wall steel thickness | 6 mm |
| Boiler body warranty | 4 years |
