The boiler ROJEK A 15 is designed for heating buildings with low heat loss, adjustable power 3 – 14 kW.
Automatic hot water boiler A 15 enables to burn wooden pellets 6 – 8 mm diam. - both high quality white pellets and pellets of lower quality with bark mixture in automatic operation. Retort burner enables to burn also lower quality bio fuels - plant pellets and in combination with an adapter also corn. In automatic operation the boiler complies with Class 5 in accordance with the norm EN 303-5. Thanks to the fuel tank, electronic regulation and the burner with spiral feeder the boiler can work in automatic operation even for several days. The electronic regulation can be connected with a circular pump ( adjustment of temperature when the pump switches on ) and at the same time with room thermostat. The burner is installed in the lower part of boiler body. The retort burner is designed for lower fuel loading and the combustion process itself can be compared with a blacksmith hearth. From the tank the fuel is feeded by spiral feeder to the retort knee. Here it is forced out up to a round grate. Both the grate and the retort are made of high quality cast iron. The retort is placed in a converter to which the air is blown by a blower. Through the slots between the retort and the grate the air is then driven to the burning fuel layer. | 
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