It has automatic feeding ignition control system. ^ It is provided the easier venting of flue gasses with the special design connected with fire tube and the bafil technology and the level of soot is decreased and uniform heat transfer at all surfaces in the boiler. ^ It burns powder and lignite coal with high efficiency that grain size is of 0.5 - 30 mm range. ^ The ease of usage is provided by expanding the maintenance and clearance periods due to the fuel reservoir with high capacity. ^ The combustion air control is made through digital control system by adjusting the fan speed and flow rate control from the digital card. Digital thermostat holds the adjustments of the system temperature at the band range of the value specified and provides homogenous heat distribution and substantially fuel saving. It may be supplied remote control upon request. ^ The project complies with the TSI (Turkish Standards Institution) EN 303-5 and has the construction oriented from European Standards EN norm. ^ High volume of fuel reservoir (bunker) satisfies long term feeding. ^ Combustion chamber consists of firing pot and grills. It is designed to have proper sizes to be adequate to provide sufficient fuel level and to be enabling high efficiency combustion that firing gases are to be discarded easily. The control of combustion chamber can be viewed from the furnace ceramic observation glass which is resistive to thermal and mechanical choke and the combustion is to be controlled. ^ All the types have the ash removal hatches. The slags and ashes be comprised of fuel burning in the cell are fall into the ash removal tray and then be cleared with ease. ^ Boiler pipes can be cleaned in regular periods by means of cleaning hatch. ^ The stuffings used in boiler hatches are designed to be conformed with the safety measures of human health and ambient conditions. ^ It has a very stable of heat insulation. The entire boiler is covered by glass wool insulation material. ^ The fan supplies the necessary combustion air by means of controlling the flow rate and pressure with the digital control unit. The fan speed control satisfies the combustion efficiency at a maximum level and overwhelms the opposite pressure of the gas lines arised in the boiler. ^ Fan flap is movable and it provides air entry for the firing pot during the fan's activation. The air inlet to the combustion room is inhibited during the boiler sleeps and the firing control is to be provided. ^ Outer body and front hatches are so designed to be dismounted easily in order to service and install with ease. ^ The boiler hatches are covered with special refractor material and do not exude the heat. And it prevents the thermal effects towards the inside of the boiler from outside. ^ The chimney draught is controlled by the adjustable chimney flap. ^ For the boiler models which have the capacity range of 15.000 kcal/h to 60.000 kcal/h there exist 3-way circulation pump.