The main feature of the ATTSU CSPM biomass boiler is the adaptability of its chambers to the type of biomass used and to the combustion waste generated. The chambers can be fixed, mobile, cylindrical-vertical or cylindrical-horizontal grills. Its design, distribution and section of the home and the pipes allow this boiler to get less dirty, and therefore less stops have to be made to clean it. By having the wall, water-cooled, it allows you to control the temperature of the combustion home, avoiding the formation of slags and the smelting of ashes.