Equipped with catalytic converter and bypass valve the firewood boiler works on the principle of top combustion. The large combustion chamber is designed so that each type of boiler can burn firewood lengths of up to 53 or 63 cm.
Because of the bypass valve a fast pre-heating is ensured and prevents poisoning of the catalyst. The flue gas is distributed evenly through additional turbolators. Because no fans are required, no external power is required.
Technical data
SPK 15
rated heat output wood/brown coal briquet: 15 / 23 kW
Efficiency: 85%
Water content: 76 l
Dimensions (H/B/D): 1148 x 430 x 900 mm
Dimensions of combustion chamber: 300 x 330 mm
Draft requirement: 15 Pa
content of combustion chamber: 86 l
Permissible operating pressure: 2,5 bar
Dust wood/brown coal briquet: 58,8 / 30,7 mg/m³
CO-content wood/brown coal briquet: 611,6 / 478,9 mg/m³
CO²: 13 %
Exhaust gas flow: 16 g/s
Exhaust gas temperature(average): 235 °C
Minimum / maximum flow temperature: 70 / 90 °C
Exhaust outlet top: 160 mm
Connections forward / rewind / therm. Safety valve: 1" / 1" / 3/4"
Weight: 270 kg
SPK 49
rated heat output wood/brown coal briquet: 30 / 45 kW
Efficiency: 85%
Water content: 95 l
Dimensions (H/B/D): 1285 x 550 x 1027 mm
Dimensions of combustion chamber: 400 x 360 mm
Draft requirement: 15 Pa
content of combustion chamber: 125 l
Permissible operating pressure: 2,5 bar
Dust wood/brown coal briquet: 64,6 / 33,54 mg/m³
CO-content wood/brown coal briquet: 626,8 / 482,64 mg/m³