Comfort S series burners are modern and advanced devices for burning biomass in the form of wood pellets. These burners have a rotary combustion chamber, changing its position during operation of the burner cleans the furnace from slag and ash formed as a result of fuel combustion. Ignition consists in charging the initial dose and lighting the fire by heating the fuel to the ignition temperature using an igniter placed in the burner. Burning and extinguishing controlled by the controller. The burner is cleaned by cyclical rotation of the combustion chamber.