GK 21 fireplace insert

The GK21 is an elegant firebox made of steel and cast iron, cast in Gerkand. It has 19 kW of nominal 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. It can be in single or double-faced version.

Another quality product from Gerkand!

Technical information

Nominal power in kW19
Maximum power in kW23
Overall dimensions (mm)710 x 560 x 1000
Weight (kg)140
Efficiency (%)78
Hearth Dimension (L x P x H) mm610 x 415 x 350
Glass dimension ( L/H ) mm616 х 370 х 4
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 doorsteel
Type of handlesteel
Emissions of CO (%)0.1545
Exhaust temperature295 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

Product Benefits

  • curved panoramic glass

  • maximum power of 23 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 firebox is also available in the following version:

  • Double-face version

Quick Request

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