GK 21 firebox with air jacket

The GK21 is an elegant firebox made of steel and cast iron cast in Gerkand. It has a 14kW nominal power of the air jacket, 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
Air jacket nominal power in kW14
Overall dimensions (mm)710 x 560 x 1420
Weight (kg)150
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
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 (%)0.1845
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
Air flow850 m3/h
Fan powerMin 80w/h max 120w/h
Number of nozzles6 on the upper side
Air duct diameter100 mm

Product Benefits

  • curved panoramic glass
  • nominal power of the air jacket 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 air jacket is also available in the following versions:

  • GK 21 double-face

Quick Request

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