Nominal heat output: 10.4 kW
Depth/Width/Height: 72/60/67 cm
Weight: 87 kg
Depth/width/height: 73x60x67 cm
Weight: 97 kg
Combustion chamber depth: 50 cm
Exhaust gas stubs: 12 cm
Unlike the Free Flow, the O-Model burns on an ash grate. The O-Models have no additional convection-back, there is as such no optional connection for an external combustion air supply.