GK 21 water heating fireplace insert

The GK21 is an elegant firebox made of steel and cast iron cast in Gerkand. It has a 14kW nominal power of the water heater power, allowing you to easily heat even larger spaces. Characteristic of the GK21 is the curved shape of its door and the panoramic high-quality heat-resistant glass. It opens sideways and has easy access to the ashtray.
Another quality product from Gerkand!

Technical information

Nominal power in kW19
Maximum power in kW23
Boiler nominal power in kW14
Overall dimensions (mm)710x560x1000
Weight (kg)160
Efficiency (%)78
Hearth Dimension (L x P x H) mm610x415x350
Glass dimension ( L/H ) mm616х370х4
Smoke exit positionUp
Chimney (mm)200
Maximum log size (mm)550
Finishing materials / thickness (mm)Steel, 4mm and cast iron
Type of cast ironGray Cast iron
Thickness of cast iron (mm)From 5 to 12 mm
Gasket sealing materialsISO GLASS
Glass resistance and typeCeramic 750°C
Surface coatingHeat resistance to 600°C
Type of doorCast iron
Type of handleCast iron
Emissions of CO (%)0.1845
Exhaust temperature280°C
Mass flow of smoke (g/s)12,28
Dust concentration discarded in 13% СО2>57,4 mg/m³
Wood consumption (kg/h)5,48
Minimum distance to adjacent materials: rear / side / front / down (mm)200 / 200 / 1200 /400
Depression chimney required12 Pa
StandardEN 13229
Heat exchanger volume ( litres)27
Optimum operating temperature of the heat exchanger (°C)60°С
Boiler connections (ø)1 ″

Product Benefits

  • curved panoramic glass
  • nominal power of the water heater 14 kW
  • side opening of the door


  • 3 years warranty
  • Hand welded seams and assemblies
  • Cast iron foundry into the Gerkand factory
  • Business and individual high value service

Product variations

GK 21 fireplace insert with water jacket is also available in the following versions:

  • Version GK 21 double-face

Quick Request

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