Rojek PK Pyrolytic wood gasification boilers achieve efficiencies of between 84  - 90 % and comply with Class 3 in accordance with the Norm 303 - 5 . The pyrolytic boilers are top loading which allows the complete volume of the combustion chamber to be used which results in a longer burning cycle of up to 7 hours depending upon the quality of wood used and the size of the boiler. It is designed for the burning of fire wood ( length 530mm ) but also for short piece wood or wood briquettes.  This range of boilers are controlled electronically and have a regulator with an exhaust sensor. This enables the control unit to vary the speed of the fan to maintain the temperature of the boiler water. Using this type of regulator with an exhaust sensor can save up to 13%  of fuel and can increase the operational life of the boiler. It also reduces emissions into the environment. swansolar.eu The boilers are available in 20kW , 25kW and  30kW models. © Swan Solutions de Propriete 2012