Therefore, the biomass combustion process carries a number of problems related to its physical and chemical
characteristics, mainly with the content of volatile substances that enforce the stringent air economy affecting the
temperature of the process and structure of the exhaust gases emission.
The aim of the research was to perform the combustion of pellets made of selected biomass types in the low temperature water boiler of top combustion, while carrying out the analysis of exhaust gas for the presence of CO,
NO, and SO2 with respect to the fuel type and the air supply.