KALVIS K-4CM 7kW heating boiler-stove, RAL8011

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KALVIS K-4CM is a compact solid-fuel central-heating boiler-cooker designed for both space heating and cooking. According to the official KALVIS technical table, the nominal output is 8 kW.

Its compact design makes the K-4CM suitable for smaller rooms, while the wide firebox door makes loading wood easier. The appliance has a 33-litre combustion chamber, and one fuel load can burn for up to 6 hours.

Maximum wood-log length is 32 cm. Wood logs are the primary fuel, while coal, waste wood, peat briquettes and sawdust briquettes may also be used as substitute fuels. KALVIS does not recommend firewood with a moisture content exceeding 25%.

Efficiency when firing wood logs is 70%, while boiler water volume is 23 litres. With sufficient chimney draught, the appliance can also be connected to a heating wall. The armrest can be installed on either side, and KALVIS provides a 4-year warranty for the boiler body.

Main advantages

• Space heating and cooking in one appliance
• Nominal output 8 kW
• Compact construction
• Suitable for central-heating systems
• Wide firebox door
• 33 l fuel chamber
• Burn time up to 6 hours
• Maximum log length 32 cm
• Efficiency 70%
• Several permitted solid-fuel options
• Heating-wall connection possible with sufficient chimney draught
• Armrest can be installed on either side
• 4-year boiler-body warranty.

Technical information

1. Cast iron stove with hoops

2. Heat exchanger cleaning cover

3. Flue and flue damper

4. Heat exchange compartment

5. The ash removal cover is installed

6. Ash drawer

7. Grid

8. Guardrails