Pyrolytic boiler for solid fuels (with cooling loop) nominal power 20 kW

Pyrolytic boiler ROJEK PK 20/PK BIO 20 for manual loading of wood – max. length of wood 530 mm, humidity of wood max.20 %, heat power 14 – 18 MJ/kg, or brown coal (fraction 20 – 40 mm), humidity of fuel max. 15 %, heat power 14 – 20 MJ/kg.

For brown coal the boiler is certified in Class 4 in accordance with the norm ČSN EN 303-5.

For wood the boiler is certified in Class 4 /PK 20/ and Class 5 /PK BIO 20/ in accordance with the norm ČSN EN 303-5.

The boiler body is made of high quality steel, inner sheet 5 mm thick, other surfaces 4 mm thick.

New generation of heating boilers for solid fuel and wood chippers of own design
PK 20


Nominal output 20 kW
Efficiency 85,7 %
Chimney diameter 159 mm
Electric input 76 W
Voltage / frequency 230 V/ 50 Hz
Hopper volume 130 l
Heating water capacity 98 l
Diameter of water inlet and outlet DN G 2″
Chimney height 574 mm
Size (WxHxD) 916 (784) x 1 186 x 1 262 mm
Boiler class in accordance with Norm EN 303-5 4
Energy efficiency class of wood / coal A + / C
Energy Efficiency Index (EEI) of wood / coal 115 / 77
Seasonal energy efficiency of wood / coal 79 % / 77 %
Boiler emissions according to Commission Regulation (EU) No. 2015/1189 EKODESIGN
Recommended fuel dry wood 15 – 17 MJ/kg
Max. diam./length of wood 250/ 530 mm
Fuel moisture 12 – 20 %
Specified chimney draught 10 – 18 Pa
Boiler weight 505 kg
Wood consumption for nominal output 4,87 kg/h
Consumption of brown coal for nominal capacity 5,75 kg/h

guarantee for the tightness of boiler body 3 years

● Upper loading of combustion chamber – very easy and quick

● Bigger volume of combustion chamber (130 l)

● High efficiency

● Boilers fulfil Class 4 and 3 depending on used fuel in accordance with the norm ČSN EN 303 – 5

● Max. length of wood 530 mm

● Longer time for burn-up of combustion chamber up to 7 – 9 hours depending on quality of wood and boiler power

● Easy cleaning of exchanger by means of a handle and cleaning door accessible from outside

● Boilers are controlled by electronic control unit that controls: exhaust fan, water temperature in boiler – switching on the pump and switching off the fan, control of water temperature, manual or automatic operation, time for fuel burn-up, manual operation for firing, adjustable speeds of fan, exhaust sensor, boiler and regulator protection, sound alarm, choice of languages.

The regulator is provided with programme zPID

In addition to standard sensors the regulator is also provided with exhaust sensor. It controls exhaust temperature and temperature of boiler water.

Boilers for manual loading model ROJEK PK are recommended to be operated with accumulation tanks.

Min. recommended volume of an accumulation tank with boiler ROJEK PK 20 is 800 l

You can also be interested