Description
Kratki MBM Right-Sided 12kW Water Jacket Fireplace Insert – Black TERMOTEC
The Kratki MBM Right 12kW is a premium wood-burning fireplace insert designed to combine the appearance of a modern built-in fireplace with the additional benefit of water heating.
Its integrated water jacket allows heat generated by the fire to be transferred into a compatible central heating system, while still providing direct warmth to the room. With a 12kW nominal output, the MBM delivers an average of 7kW to the water system and 5kW for space heating.
Finished with elegant glazing and a black TERMOTEC-lined combustion chamber, the MBM creates a striking contemporary focal point while achieving an impressive 85% thermal efficiency and A+ energy rating.
Efficient Water Heating
Unlike a conventional air-only fireplace insert, the MBM incorporates a water unit capable of transferring a significant proportion of the generated heat into a compatible heating system.
The fireplace has a 27-litre water capacity, maximum operating pressure of 2 bar and an average water output of 7kW, while approximately 5kW is delivered directly into the room.
This makes it an excellent option for homeowners who want the appearance and atmosphere of a real wood-burning fireplace while making greater use of the heat it produces.
Maximum Use of Energy
The combustion chamber is lined with black TERMOTEC, Kratki’s heat-accumulating material designed to increase the temperature inside the firebox and support efficient combustion.
Two deflectors extend the path travelled by the flue gases, helping to improve combustion efficiency and make better use of the energy generated from the fuel.
The result is an impressive 85% thermal efficiency, with a usable heating power range of 5–14kW.
External Air Supply
Combustion air can be supplied directly from outside the property through the integrated 125mm external air connection.
Airflow is regulated using a single control positioned beneath the door, providing straightforward and precise control over the combustion process.
The fireplace uses a dual air-supply system. Primary air assists with lighting and combustion from below, while additional air is directed into the upper combustion chamber to support the burning of gases produced during combustion.
Clean Glass System
An integrated air curtain system directs air across the glass, helping to reduce soot deposits and keep the viewing area cleaner during operation.
This allows the impressive flame picture to remain visible while reducing the frequency with which the glass requires cleaning.
Black TERMOTEC Interior
The combustion chamber is finished with black TERMOTEC lining, giving the fireplace a sophisticated contemporary appearance.
In addition to its visual appeal, TERMOTEC is designed to accumulate heat and increase temperatures within the combustion chamber, supporting efficient combustion.
The specially profiled TERMOTEC base also creates a deeper combustion chamber capable of accommodating logs up to 50cm long.
Built for Safety & Durability
The body and front of the MBM are manufactured from high-quality steel designed to withstand high operating temperatures.
Heat-resistant ceramic glazing is capable of withstanding temperatures of up to 660°C, while the specially perforated door handle is designed to reduce excessive heat build-up for more comfortable operation.
Solid welding and precisely manufactured steel components provide excellent durability and tightness.
Easy Installation & Maintenance
A removable grate and ash pan make routine cleaning and maintenance straightforward.
Adjustable feet allow the fireplace to be accurately levelled during installation, while the movable smoke outlet provides greater flexibility when connecting the appliance to the chimney system and can reduce the need for additional connecting elbows.
Ecodesign Compliant
The Kratki MBM has been engineered with efficient and environmentally conscious combustion in mind and meets Ecodesign and BImSchV 2 requirements.
It carries an A+ energy rating with an Energy Efficiency Index (EEI) of 111.
Technical Specifications
- Nominal output: 12kW
- Heating output range: 5–14kW
- Average output to water: 7kW
- Room heating output: 5kW
- Thermal efficiency: 85%
- Energy class: A+
- Water capacity: 27 litres
- Maximum working pressure: 2 bar
- Flue outlet diameter: 180mm
- External air intake: 125mm
- Maximum log length: 50cm
- Door opening: Right
- Construction: Steel
- Combustion chamber: Black TERMOTEC
- Fuel: Seasoned hardwood with moisture content ≤20%
- Width: 78cm
- Height: 122cm
- Depth: 53cm
- Weight: 230kg
Certifications & Compliance
KRATKI PRO | Ecodesign | BImSchV 2 | Designed for Recuperation
The Kratki MBM Right 12kW Water Jacket Fireplace Insert is an excellent choice for contemporary installations where you want the visual impact of a built-in wood-burning fireplace combined with the ability to contribute heat to a compatible water-based heating system.









