KALVIS K-4B-1 13kW heating boiler-stove, RAL8011

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KALVIS K-4B-1 is a solid-fuel central-heating boiler-cooker designed for both space heating and cooking. Its nominal output is 13 kW, while efficiency when burning wood logs reaches 72%. The compact construction makes it suitable for installation in relatively small rooms.

The appliance features a large 50-litre fuel chamber and a wide firebox door for convenient wood loading. The combustion chamber has two fire-grate positions, allowing the firebox configuration to be adapted to operating needs.

A single fuel load can burn for up to 10 hours, while the maximum wood-log length is 33 cm. Actual burn time depends on fuel type, moisture content, outdoor temperature and other operating conditions.

The primary fuel is wood logs. KALVIS also permits coal, pieces of waste wood, peat briquettes and sawdust briquettes as substitute fuels. Firewood with moisture content exceeding 25% is not recommended.

Boiler temperature is regulated automatically. The construction includes an ignition damper, flue and draught damper, draught regulator, ash-cleaning cover, ash drawer, two fire-grate positions and thermometer. KALVIS provides a 4-year warranty for the boiler body.

Main advantages

• Space heating and cooking in one appliance
• Nominal output 13 kW
• Efficiency 72%
• Automatic boiler-temperature regulation
• Compact construction
• Large 50 l fuel chamber
• Two fire-grate positions
• Wide firebox door
• Burn time up to 10 hours
• Maximum log length 33 cm
• Ignition damper
• Flue and draught damper
• Draught regulator
• Ash drawer
• Thermometer
• Several permitted solid fuels
• 4-year boiler-body warranty.

Technical information

1. Cast iron hob

2. Start valve

3. Flue and flue damper

4. Traction control

5. Built-in, ash removal cover

6. Ash drawer

7. Grid

8. Upper grid position

9. Thermometer