ATTACK WOOD FIRE BOILER is new, modern wood-gasifying boiler with low requirements for chimney draught with the output of 35 kW suitable for the buildings without electric energy (version ATTACK WFB35). Innovative wood-gasifying boiler is unique thanks to its high efficiency 89 %
Big feeding chamber
The advantage is big feeding chamber with the volume 200 litres with the possibility to load big wood logs. The lenght of chamber is 590 mm. It makes the work easier and saves the time by chopping the wood – customer cuts the wood to half-metres pieces.
Low requirements for chimney draught
The advantage of the boiler ATTACK WFB 35 is low requirements for chimney draught as it does not require fan neither electric energy. It can be installed in buildings which do not have electric connection or are equipped with chimney with low height. Regulation is realized by adjustable thermostatic control flap.
Innovative wood-gasifying boiler with manual supply ATTACK WFB 35 with the output 35 kW is unique thanks to its high efficiency 90 % and very long duration of continual burning by full use of feeding chamber which is 4-6 hours.
Protection against tars
You will not have the problems with tars with new wood-gasifying boiler. The boiler has a dry coat placed on four sides of the entire feeding chamber. Dry coat protects the boiler’s body from tars and acids.
The boiler is manufactured from the high quality special boiler steel of 6 mm to ensure long life-time.
WFB vs WFB Profi
The wood-gasifying boiler ATTACK WFB 35 has low requirements for chimney draught as it does not require fan neither electric energy.
The version of the ATTACK WFB 25 PROFI boiler is intended for installations with insufficient natural chimney draught where an additional flue gas fan is required. If necessary you can purchase an extension kit (includes: fan, electronics, wiring). This kit extends the boiler to the PROFI version.
The ATTACK WFB 25 PROFI boiler is equipped with a modern regulator that enables continuous power modulation by regulating the speed of the flue gas fan. The controller’s clear display shows, in addition to the operating parameters, messages related to boiler diagnostics and settings.
The ATTACK PROFI of the „PID“ generation is a kind of the advanced regulator, which enables to modulate the heat output in the ATTACK® wood gasifying boilers by regulation of the fan rotations. The well-readable display shows the necessary information and makes the boiler control easier.
The ATTACK SLX PROFI boiler brings the improvement of the PID regulation to control the fan rotations according to the temperature of water and flue gas and thereby to achieve the optimal efficiency. The regulator uses the advanced Fuzzy logic system for control to regulate the wood gasification system in the optimal way – to ensure the lowest heat loss possible.
The boiler equipped with the regulator ATTACK PROFI „PID” can control the heating system equipped with the following items: a pump for charging the accumulation tank, accumulation tank, circuit pump of heating circuits and room thermostat, by the lowest loss of heat energy possible. The regulator can be connected and set in the way enabling to control the pump of heating circuits and pump to charge the tank for domestic hot water.
Properties – regulation PROFI
- innovated electronics with fluent PID regulation of the fan rotations according to the flue gas temperature
- Fuzzy logic – optimal regulation of the operating cycle of wood burning
- increased boiler efficiency and stable burning
- several options of control, including the pump to charge the accumulation tank, pump to charge the D.H.W. tank and the circuit pump of the heating circuits
- option to control the circuit pump by thermostat
- well-readable display indicating the operation of particular elements
|Parameter||Unit||WFB35||WFB35 – PROFI|
|Nominal output of boiler||kW||31||35|
|Output range||kW||29||17 – 33|
|Volume of feeding chamber||dm3||200|
|Dimension of feeding door||mm||380×370|
|Prescribed chimney draught||Pa||19|
|Max. operating overpressure of water||kPa||250|
|Weight of the boiler||kg||590||600|
|Diameter of the flue gas outlet||mm||150|
|Height of the boiler||mm||1397||1420|
|Width of the boiler||mm||730|
|Depth of the boiler||mm||1162||1280|
|Depth of the feeding chamber||mm||590|
|Diameter of the riser pipe||G 6/4“|
|Diameter of the reverse||G 6/4“|
|Electrical input at the nominal output||W||–||38|
|Electrical input at the minimal output||W||–||19|
|Electrical input at the standby||W||–||< 5|
|Class of energy efficiency of the boiler||–||A+|
|Temperature of the flue gas by the nominal output||°C||176||149|
|Temperature of the flue gas by the min. output||°C||95|
|Mass flow of the flue gas by the nominal output||kg/s||0,022|
|Mass flow of the flue gas by the min. output||kg/s||0,009|
|Max. noise level||dB||–||65|
|Class and the type of the fuel||–||A+, wood pieces with relative moisture of 12-20%, ∅ 50-150 mm|
|Average wood consumption||kg/h||7,5||1,8 – 6,9|
|Max. length of logs||mm||500|
|Time of burning by nominal output*||h||4||4|
|Water volume in the boiler||l||110|
|Recommended volume of the accumulation tank||l||1500|
|Range of the setting the temperature |
of the heating water
|°C||65 – 90|
|Capacity of the contacts of the boiler regulator|
|* depending on the type of fuel and perfection of the feeding the chamber with wood|