This boiler is to easy use thanks to its wide front doors that enable the user to burn wood logs and coal pieces. Thanks to its manually rotatable grate system, it keeps a continuous efficient burning by stirring the fuel during combustion. The burning chamber is cleaned manually via the help of a lever. The flue draught can be adjusted with the flue damper and thanks to heat exchanger turbulators, maximum fuel savings is obtained. The combustion chamber and grate of this device are made of cast iron, and the heat exchanger and water jacket are made of steel. It has a heating capacity starting from 46 KW up to 116 KW and a water capacity starting from 110 liters up to 210 liters, a maximum working pressure of 3 bar and maximum boiler outlet water temperature of 90℃.