BURNiT PyroBurn Lambda 30, 32kW


Availability: In stock

SKU: 0000002669

Gasification solid fuel boiler Burnit PyroBurn Lambda 30 for central heating of premises. Constructed for solid fuel burning - wood and briquettes.

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Product Description

Wood gasifying boiler BURNiT PyroBurn LAMBDA

A highly-efficient wood gasifying boiler, designed for economical and ecological heating of medium to large-sized premises.

The boiler  PyroBurn LAMBDA provides:
- intuitive operation interface
cleaning system (manual)
- heat output regulation
- 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).
- A complex of safety devices ensure its safe operation.

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

Available sizes kW: 22 up to 27, 27 up to 32

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.
wood gasification
1.Incoming air;
2.Primary air 
3.Secondary 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.
  • Exhaust gas sensor.
  • 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.
  • 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

Safety devices

- Upon reaching 95°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 99°С
- Safety heat evacuator
- Pressure relief valve 3 bar
- Safety heat evacuator: a tap-water filled line passes through the uppermost 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.


The central heating boiler can operate with natural untreated wood, but also with coal and compressed solid fuel such as briquettes. Maximum length of the wood logs is 500mm. Fuel moisture should be 15% or lower.

In order to use the maximum caloricity of the fuel, the wood logs should be dried for a prolonged period of time. High moisture levels reduces caloricity and the output power of the boiler.

Schematic of the main features of a PyroBurn Lambda gasification boiler

Sunsystem PB Lambda schematic
1. Controller
2. High efficiency thermal insulation
3. Housing
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

Additional Information

1 year electronic components, 2 years on the boiler

Weight (kg)

Country of Manufacture

Product Brand

Heat output (kW)

Nominal thermal power (kW)

Range of heat output (kW)
27 - 32

Dimension Depth (mm)

Dimension Width (mm)

Dimension Height (mm)

Loading door size (Height, Width), mm

Efficiency (%)

Mantle volume (L)

Insulation boiler
High eficiency thermal wool

Insulation doors
Ceramic plates and high efficiency thermal wool

Combustion viewer

Operating pressure (bar)

Operating temperature (℃)
65 - 85

Min. return water temperature (°C)

Recommended fuel
wood, humidity 15 - 20%, wood briquettes

Burning time partial/ full load (h)

Maximum length of the firewood logs (mm)

Flue (mm)

Required chimney draught (Pa/mbar)
10 - 15 / 0,10 - 0,15

Flue gas flow

Exhaust gas temperature (operation mode), °C
130 - 150

Fume extraction device
W : Yes

Exhaust Location
Back side

Lambda sensor

Control panel

Control of central heating pump

Electric power supply (V/Hz)

Average power consumption (W)

Combustion forced ventilation

Class of boiler according to EN 303-5

Cold water inlet
A : R 1 1/4'' / 170 mm

Hot water outlet
B : R 1 1/4'' / 1325 mm

Safety line sleeve
K : Yes

Safety heat evacuator inlet/outlet
E : R 1/2'' / 1235 mm

Air intake flap
Primary air V1: 655mm / Secondary air V2: 515mm

Step-regulated motor (servo-actuator), mm
M1 : 655 / M2 : 515

Upper cleaning opening
O1: 455/120 mm

Lower cleaning opening
O2: 350/140mm

Y : R 1/2'' / 100 mm

Ash and soot container

Files & Manuals

View FileUser manual for Sunsystem Burnit PyroBurn Boiler Lambda EN    Size: (2.26 MB)