Wood gasifying boiler BURNiT PyroBurn Lambda

от 5918,00 лв.

A highly-efficient wood gasifying boiler, designed for economical and ecological heating of medium to large-sized premises.
The PB Lambda boiler provides intuitive operation interface, heat output regulation. cleaning system and Lambda oxygen sensor as well as sophisticated safety systems.

Thanks to the integrated lambda sensor the combustion process is optimized to such an extent that boiler efficiency exceeds 91%, and exhaust gas emissions conform to strictest EU standards. The water mantle embraces the combustion chamber in full to utilize the emitted heat most efficiently.
Built-in high temperature ceramic plates ensure uniform heat distribution and protection of the water mantle from the extreme heat produced by wood gasification (up to 1200°C).

Tested and approved according to EN 303-5, class 5.


Fume exhaust fan
Simple installation and handling
Microprocessor control
Eyepiece for viewing
Wood gasification

Wood gasification

The wood in the primary burning chamber is fired in a low-oxygen environment reaching about 580°С. It starts degrading to a combustible gas of carbon compounds which is directed to the orifice of the secondary combustion chamber. There, the gas is enriched with secondary air and ignites to reach temperature of up to 1200°C.
Before leaving the boiler body, the gas passes through a flue with built-in spiral turbulators where it gives away its heat to the water mantle and cools down to 150°С. Thanks to the wood gasification principle the fuel is most efficiently consumed with minimum carbon emissions and ash.


1 – Incoming air
2 – Primary air
3 – Primary air
4 – Ignition
5 – Pyrolysis combustion
6 – Fume exhaust fan
7 – Flue

Product Features:

  • The microprocessor control is able to control operation of buffer tank and one DHW circuit through the built-in terminals for connecting circulation pumps and DHW sensor.
  • Lambda sensor for accurate combustion process management.
  • Cleaning system (manual).
  • Fume exhaust fan.
  • Open door sensor and fume extraction opening chamber keeps smoke from polluting the boiler room during reloading. Open door sensor detects when boiler door is open and activates fume extractor fan on full speed (100%). Fume extractor fan draws smoke from the chamber to the chimney
    via back-side upper chamber opening.
  • Actuator-driven air flaps for air intake management.
  • Смукателен вентилатор за изходящите димни газове на котела.
  • Large firebox door ensures easy loading even with bigger logs (length of logs up to 50 cm).
  • Combustion chamber protected on all sides by ceramic plates.
  • Eyepiece for viewing the combustion process.

Available sizes, kW:

  • 25, 30

Safety devices

  • Upon reaching 90°С the controller turns the fan off and activates the pumps for domestic hot water and heating system. An independent STB thermostat shuts down the fan upon reaching 95°С.
  • Safety heat evacuator;
  • Pressure relief valve 3 bar.


1 – Controller
2 – Housing
3 – High efficiency thermal insulation
4 – Safety heat evacuator
5 – Water mantle (jacket)
6 – Wood-loading chamber
7 – Pyrolysis combustion chamber
8 – Cleaning system
9 – Hot water outlet
10 – Flue gas sensor
11 – Lambda sensor
12 – Flue
13 – Flue gas extraction fan
14 – Actuator-driven primary air flap
15 – Actuator-driven secondary air flap
16 – Cold water inlet

Technical specifications

Rated power / Minimum ÷ Maximum power kW 25 / 22÷27 30 / 27÷30
Mass flow usr. gases maximum power kg/s 0.017 0.02
height H mm 1285 1435
Width L / D Depth mm 675/1130 765/1130
Volume water jacket L 75 85
Volume combustion chamber L 98 143
Required chimney draft Pa/mbar 10÷15 /0.10÷0.15 10÷15 /0.10÷0.15
boiler high heat-resistant wool
Isolation Chamber Doors ceramic elements
ceramic components + high heat-resistant wool
Power electrical part W 200 200
Power supply voltage V/Hz 230/50 230/50
recommended fuel firewood, humidity 15%; wood briquettes
Time to burn partial / full load h 10/6 14/8
Fuel for heating season m3 10 ÷ 20 15÷23
Dimensions of Education charging mm 490×200 490×260
Max. length of wood mm 500 500
Recommended volume of buffer L 1000 2000
Temperature exhaust gas (in operation) °C 130-150 130-150
Operating temperature range °C 65-85 65-85
Min. temperature of the returning coolant °C 60 60
Working pressure bar 3 3
weight kg 488 605
Login cold water A, mm G1¼“/ 160 G1¼“/ 170
Exit hot water B, mm G1¼“/ 1180 G1¼“/ 1325
Slot sensor or safety valve К yes yes
Input / Output safety exchanger Е, mm R ½“/1090 R ½“/1235
F, ø / mm ø150/1000 ø150/1135
J, mm 338 382
Manhole at the top O1, mm 400/140 455/200
Manhole at the bottom O2, mm 350/140 350/140
draining Y, mm R ½“/87 R ½“/100
Airflow valves for the primary air V1, mm 595 655
Secondary air valve V2, mm 440 515
Motor, stepper / servo actuators / M1, mm 595 655
M2, mm 440 515
suction fan W, mm 815 950
Lambda probe λ yes yes
Sensor Exhaust gases T yes yes
cleaning system S yes yes
Hole monitoring combustion P yes yes