Steel boiler with intelligent controller and electric fan for forced air feed. Wood-fired boilers WB-S Active range in nominal output from 20 to 110 kW to satisfy the heating demands of medium to large sized spaces. They are engineered for burning solid fuel and provide the option for fitting pellet, oil or gas-fired burners

Electronic control unit controls the combustion by modulating the fan speed. Optional control of circulation pumps for DHW and central heating.

Electric fan for forced air feed optimizes the combustion and the fuel consumption rate

Combustion chamber with large heat exchanging surface and low chamber resistance

Large firebox door ensures easy loading even with bigger wood chunks

Ribbed chamber surface and three-pass flue gas flow for improved heat exchange

Burner flange on lower door for fitting gas, oil, or pellet burners

Exchangeable metallic ash grate protects the chamber base from the flame

Safety devices:

[1] Pressure relief valve 2,5 bar incl.in the delivery set

[2] Safety heat evacuator a tap-water-filled line passes through the upmost part of the boiler body. In case of overheating it is triggered open by a thermostatic valve (not included) to evacuate the heat off the boiler.

This appliance complies with EN 303-5